Publisher: Inderscience Publishers   (Total: 449 journals)

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Showing 201 - 400 of 449 Journals sorted alphabetically
Intl. J. of Image Mining     Hybrid Journal   (Followers: 1)
Intl. J. of Immunological Studies     Hybrid Journal   (Followers: 1)
Intl. J. of Indian Culture and Business Management     Hybrid Journal   (Followers: 3)
Intl. J. of Industrial and Systems Engineering     Hybrid Journal   (Followers: 11, SJR: 0.34, CiteScore: 1)
Intl. J. of Industrial Electronics and Drives     Hybrid Journal   (Followers: 3)
Intl. J. of Information and Coding Theory     Hybrid Journal   (Followers: 6)
Intl. J. of Information and Communication Technology     Hybrid Journal   (Followers: 8, SJR: 0.13, CiteScore: 0)
Intl. J. of Information and Computer Security     Hybrid Journal   (Followers: 16, SJR: 0.141, CiteScore: 0)
Intl. J. of Information and Decision Sciences     Hybrid Journal   (Followers: 10, SJR: 0.233, CiteScore: 1)
Intl. J. of Information and Operations Management Education     Hybrid Journal   (Followers: 8)
Intl. J. of Information Privacy, Security and Integrity     Hybrid Journal   (Followers: 27)
Intl. J. of Information Quality     Hybrid Journal   (Followers: 3, SJR: 0.111, CiteScore: 0)
Intl. J. of Information Systems and Change Management     Hybrid Journal   (Followers: 12, SJR: 0.141, CiteScore: 0)
Intl. J. of Information Systems and Management     Hybrid Journal   (Followers: 4)
Intl. J. of Information Technology and Management     Hybrid Journal   (Followers: 12, SJR: 0.12, CiteScore: 0)
Intl. J. of Information Technology, Communications and Convergence     Hybrid Journal   (Followers: 16)
Intl. J. of Innovation and Learning     Hybrid Journal   (Followers: 25, SJR: 0.26, CiteScore: 1)
Intl. J. of Innovation and Regional Development     Hybrid Journal   (Followers: 8)
Intl. J. of Innovation and Sustainable Development     Hybrid Journal   (Followers: 11, SJR: 0.271, CiteScore: 1)
Intl. J. of Innovation in Education     Hybrid Journal   (Followers: 9)
Intl. J. of Innovative Computing and Applications     Hybrid Journal   (Followers: 3, SJR: 0.144, CiteScore: 1)
Intl. J. of Instrumentation Technology     Hybrid Journal   (Followers: 6)
Intl. J. of Integrated Supply Management     Hybrid Journal   (Followers: 4, SJR: 0.263, CiteScore: 1)
Intl. J. of Intellectual Property Management     Hybrid Journal   (Followers: 30, SJR: 0.101, CiteScore: 0)
Intl. J. of Intelligence and Sustainable Computing     Hybrid Journal   (Followers: 3)
Intl. J. of Intelligent Defence Support Systems     Hybrid Journal   (Followers: 5)
Intl. J. of Intelligent Engineering Informatics     Hybrid Journal  
Intl. J. of Intelligent Enterprise     Hybrid Journal   (Followers: 1, SJR: 0.138, CiteScore: 0)
Intl. J. of Intelligent Information and Database Systems     Hybrid Journal   (Followers: 4, SJR: 0.11, CiteScore: 0)
Intl. J. of Intelligent Internet of Things Computing     Hybrid Journal   (Followers: 3)
Intl. J. of Intelligent Machines and Robotics     Hybrid Journal   (Followers: 1)
Intl. J. of Intelligent Systems Design and Computing     Hybrid Journal  
Intl. J. of Intelligent Systems Technologies and Applications     Hybrid Journal   (Followers: 2, SJR: 0.152, CiteScore: 0)
Intl. J. of Intercultural Information Management     Hybrid Journal   (Followers: 12)
Intl. J. of Internet and Enterprise Management     Hybrid Journal   (Followers: 1)
Intl. J. of Internet Manufacturing and Services     Hybrid Journal   (Followers: 1, SJR: 0.118, CiteScore: 0)
Intl. J. of Internet Marketing and Advertising     Hybrid Journal   (Followers: 21, SJR: 0.223, CiteScore: 1)
Intl. J. of Internet of Things and Cyber-Assurance     Hybrid Journal  
Intl. J. of Internet Protocol Technology     Hybrid Journal   (Followers: 2, SJR: 0.139, CiteScore: 1)
Intl. J. of Internet Technology and Secured Transactions     Hybrid Journal   (Followers: 8, SJR: 0.217, CiteScore: 0)
Intl. J. of Inventory Research     Hybrid Journal   (Followers: 2)
Intl. J. of Islamic Marketing and Branding     Hybrid Journal   (Followers: 6)
Intl. J. of Knowledge and Learning     Hybrid Journal   (Followers: 4, SJR: 0.103, CiteScore: 0)
Intl. J. of Knowledge and Web Intelligence     Hybrid Journal   (Followers: 41)
Intl. J. of Knowledge Engineering and Data Mining     Hybrid Journal   (Followers: 41)
Intl. J. of Knowledge Engineering and Soft Data Paradigms     Hybrid Journal   (Followers: 2)
Intl. J. of Knowledge Management in Tourism and Hospitality     Hybrid Journal   (Followers: 3)
Intl. J. of Knowledge Management Studies     Hybrid Journal   (Followers: 33, SJR: 0.111, CiteScore: 0)
Intl. J. of Knowledge-Based Development     Hybrid Journal   (Followers: 5, SJR: 0.278, CiteScore: 1)
Intl. J. of Lean Enterprise Research     Hybrid Journal   (Followers: 2)
Intl. J. of Learning and Change     Hybrid Journal   (Followers: 14, SJR: 0.189, CiteScore: 0)
Intl. J. of Learning and Intellectual Capital     Hybrid Journal   (Followers: 2, SJR: 0.228, CiteScore: 1)
Intl. J. of Learning Technology     Hybrid Journal   (Followers: 9, SJR: 0.184, CiteScore: 1)
Intl. J. of Leisure and Tourism Marketing     Hybrid Journal   (Followers: 20)
Intl. J. of Liability and Scientific Enquiry     Hybrid Journal   (Followers: 1)
Intl. J. of Lifecycle Performance Engineering     Hybrid Journal   (Followers: 1)
Intl. J. of Logistics Economics and Globalisation     Hybrid Journal   (Followers: 6)
Intl. J. of Logistics Systems and Management     Hybrid Journal   (Followers: 13, SJR: 0.371, CiteScore: 1)
Intl. J. of Low Radiation     Hybrid Journal   (Followers: 1, SJR: 0.115, CiteScore: 0)
Intl. J. of Machine Intelligence and Sensory Signal Processing     Hybrid Journal   (Followers: 5)
Intl. J. of Machining and Machinability of Materials     Hybrid Journal   (Followers: 6, SJR: 0.408, CiteScore: 1)
Intl. J. of Management and Decision Making     Hybrid Journal   (Followers: 7, SJR: 0.233, CiteScore: 1)
Intl. J. of Management and Enterprise Development     Hybrid Journal   (SJR: 0.164, CiteScore: 0)
Intl. J. of Management and Network Economics     Hybrid Journal  
Intl. J. of Management Concepts and Philosophy     Hybrid Journal   (Followers: 3)
Intl. J. of Management Development     Hybrid Journal   (Followers: 13)
Intl. J. of Management in Education     Hybrid Journal   (Followers: 8, SJR: 0.209, CiteScore: 0)
Intl. J. of Management Practice     Hybrid Journal   (Followers: 4, SJR: 0.127, CiteScore: 0)
Intl. J. of Managerial and Financial Accounting     Hybrid Journal   (Followers: 9, SJR: 0.195, CiteScore: 1)
Intl. J. of Manufacturing Research     Hybrid Journal   (Followers: 8, SJR: 0.411, CiteScore: 1)
Intl. J. of Manufacturing Technology and Management     Hybrid Journal   (Followers: 9, SJR: 0.159, CiteScore: 0)
Intl. J. of Markets and Business Systems     Hybrid Journal  
Intl. J. of Masonry Research and Innovation     Hybrid Journal   (Followers: 1)
Intl. J. of Mass Customisation     Hybrid Journal  
Intl. J. of Materials and Product Technology     Hybrid Journal   (Followers: 3, SJR: 0.23, CiteScore: 1)
Intl. J. of Materials and Structural Integrity     Hybrid Journal   (Followers: 8, SJR: 0.369, CiteScore: 0)
Intl. J. of Materials Engineering Innovation     Hybrid Journal   (Followers: 2, SJR: 0.178, CiteScore: 0)
Intl. J. of Mathematical Modelling and Numerical Optimisation     Hybrid Journal   (Followers: 6, SJR: 0.157, CiteScore: 0)
Intl. J. of Mathematics in Operational Research     Hybrid Journal   (Followers: 2, SJR: 0.322, CiteScore: 1)
Intl. J. of Mechanisms and Robotic Systems     Hybrid Journal   (Followers: 2)
Intl. J. of Mechatronics and Automation     Hybrid Journal   (Followers: 6, SJR: 0.129, CiteScore: 1)
Intl. J. of Mechatronics and Manufacturing Systems     Hybrid Journal   (Followers: 2, SJR: 0.199, CiteScore: 0)
Intl. J. of Medical Engineering and Informatics     Hybrid Journal   (Followers: 4, SJR: 0.181, CiteScore: 0)
Intl. J. of Metadata, Semantics and Ontologies     Hybrid Journal   (Followers: 11, SJR: 0.173, CiteScore: 1)
Intl. J. of Metaheuristics     Hybrid Journal   (Followers: 1)
Intl. J. of Microstructure and Materials Properties     Hybrid Journal   (Followers: 8, SJR: 0.148, CiteScore: 0)
Intl. J. of Migration and Border Studies     Hybrid Journal   (Followers: 17)
Intl. J. of Migration and Residential Mobility     Hybrid Journal   (Followers: 10)
Intl. J. of Mining and Mineral Engineering     Hybrid Journal   (Followers: 8, SJR: 0.232, CiteScore: 1)
Intl. J. of Mobile Communications     Hybrid Journal   (Followers: 9, SJR: 0.665, CiteScore: 2)
Intl. J. of Mobile Learning and Organisation     Hybrid Journal   (Followers: 18, SJR: 0.85, CiteScore: 2)
Intl. J. of Mobile Network Design and Innovation     Hybrid Journal   (Followers: 2, SJR: 0.123, CiteScore: 1)
Intl. J. of Modelling in Operations Management     Hybrid Journal   (Followers: 4)
Intl. J. of Modelling, Identification and Control     Hybrid Journal   (Followers: 1, SJR: 0.401, CiteScore: 2)
Intl. J. of Monetary Economics and Finance     Hybrid Journal   (Followers: 9, SJR: 0.237, CiteScore: 1)
Intl. J. of Multicriteria Decision Making     Hybrid Journal   (Followers: 8, SJR: 0.181, CiteScore: 0)
Intl. J. of Multimedia Intelligence and Security     Hybrid Journal   (Followers: 9)
Intl. J. of Multinational Corporation Strategy     Hybrid Journal  
Intl. J. of Multivariate Data Analysis     Hybrid Journal   (Followers: 2)
Intl. J. of Nano and Biomaterials     Hybrid Journal   (Followers: 9, SJR: 0.111, CiteScore: 0)
Intl. J. of Nanomanufacturing     Hybrid Journal   (SJR: 0.17, CiteScore: 0)
Intl. J. of Nanoparticles     Hybrid Journal   (Followers: 1, SJR: 0.167, CiteScore: 1)
Intl. J. of Nanotechnology     Hybrid Journal   (Followers: 8, SJR: 0.202, CiteScore: 0)
Intl. J. of Network Science     Hybrid Journal   (Followers: 3)
Intl. J. of Networking and Virtual Organisations     Hybrid Journal   (Followers: 14, SJR: 0.163, CiteScore: 0)
Intl. J. of Nonlinear Dynamics and Control     Hybrid Journal   (Followers: 5)
Intl. J. of Nuclear Desalination     Hybrid Journal   (Followers: 1)
Intl. J. of Nuclear Energy Science and Technology     Hybrid Journal   (Followers: 5, SJR: 0.246, CiteScore: 0)
Intl. J. of Nuclear Governance, Economy and Ecology     Hybrid Journal   (Followers: 1)
Intl. J. of Nuclear Hydrogen Production and Applications     Hybrid Journal   (Followers: 1)
Intl. J. of Nuclear Knowledge Management     Hybrid Journal   (Followers: 1)
Intl. J. of Nuclear Law     Hybrid Journal   (Followers: 5)
Intl. J. of Nuclear Safety and Security     Hybrid Journal   (Followers: 1)
Intl. J. of Ocean Systems Management     Hybrid Journal   (Followers: 3)
Intl. J. of Oil, Gas and Coal Technology     Hybrid Journal   (Followers: 9, SJR: 0.265, CiteScore: 1)
Intl. J. of Operational Research     Hybrid Journal   (Followers: 3, SJR: 0.467, CiteScore: 1)
Intl. J. of Organisational Design and Engineering     Hybrid Journal   (Followers: 5)
Intl. J. of Petroleum Engineering     Hybrid Journal   (Followers: 2)
Intl. J. of Planning and Scheduling     Hybrid Journal   (Followers: 3)
Intl. J. of Pluralism and Economics Education     Hybrid Journal  
Intl. J. of Portfolio Analysis and Management     Hybrid Journal   (Followers: 4)
Intl. J. of Postharvest Technology and Innovation     Hybrid Journal   (Followers: 3, SJR: 0.144, CiteScore: 0)
Intl. J. of Power and Energy Conversion     Hybrid Journal   (Followers: 3, SJR: 0.132, CiteScore: 0)
Intl. J. of Power Electronics     Hybrid Journal   (Followers: 25, SJR: 0.233, CiteScore: 1)
Intl. J. of Powertrains     Hybrid Journal   (Followers: 2)
Intl. J. of Precision Technology     Hybrid Journal   (Followers: 1)
Intl. J. of Private Law     Hybrid Journal   (Followers: 10, SJR: 0.101, CiteScore: 0)
Intl. J. of Process Management and Benchmarking     Hybrid Journal   (Followers: 2, SJR: 0.314, CiteScore: 1)
Intl. J. of Process Systems Engineering     Hybrid Journal   (Followers: 2)
Intl. J. of Procurement Management     Hybrid Journal   (Followers: 12, SJR: 0.331, CiteScore: 1)
Intl. J. of Product Development     Hybrid Journal   (Followers: 1, SJR: 0.209, CiteScore: 1)
Intl. J. of Product Lifecycle Management     Hybrid Journal   (Followers: 1, SJR: 0.328, CiteScore: 1)
Intl. J. of Productivity and Quality Management     Hybrid Journal   (Followers: 7, SJR: 0.352, CiteScore: 1)
Intl. J. of Project Organisation and Management     Hybrid Journal   (Followers: 19, SJR: 0.273, CiteScore: 1)
Intl. J. of Public Law and Policy     Hybrid Journal   (Followers: 12, SJR: 0.108, CiteScore: 0)
Intl. J. of Public Policy     Hybrid Journal   (Followers: 4, SJR: 0.128, CiteScore: 0)
Intl. J. of Public Sector Performance Management     Hybrid Journal   (Followers: 11, SJR: 0.142, CiteScore: 0)
Intl. J. of Qualitative Research in Services     Hybrid Journal   (Followers: 4)
Intl. J. of Quality and Innovation     Hybrid Journal   (Followers: 6)
Intl. J. of Quality Engineering and Technology     Hybrid Journal   (Followers: 4, SJR: 0.134, CiteScore: 0)
Intl. J. of Quantitative Research in Education     Hybrid Journal   (Followers: 5)
Intl. J. of Radio Frequency Identification Technology and Applications     Hybrid Journal   (Followers: 5)
Intl. J. of Rapid Manufacturing     Hybrid Journal   (Followers: 3)
Intl. J. of Reasoning-based Intelligent Systems     Hybrid Journal   (SJR: 0.126, CiteScore: 0)
Intl. J. of Reliability and Safety     Hybrid Journal   (Followers: 12, SJR: 0.201, CiteScore: 0)
Intl. J. of Renewable Energy Technology     Hybrid Journal   (Followers: 10)
Intl. J. of Research, Innovation and Commercialisation     Hybrid Journal  
Intl. J. of Revenue Management     Hybrid Journal   (Followers: 2, SJR: 0.154, CiteScore: 0)
Intl. J. of Risk Assessment and Management     Hybrid Journal   (Followers: 15, SJR: 0.142, CiteScore: 0)
Intl. J. of Satellite Communications Policy and Management     Hybrid Journal   (Followers: 12)
Intl. J. of Security and Networks     Hybrid Journal   (Followers: 11, SJR: 0.212, CiteScore: 1)
Intl. J. of Sensor Networks     Hybrid Journal   (Followers: 4, SJR: 0.25, CiteScore: 1)
Intl. J. of Service and Computing Oriented Manufacturing     Hybrid Journal   (Followers: 2)
Intl. J. of Services and Operations Management     Hybrid Journal   (Followers: 5, SJR: 0.288, CiteScore: 1)
Intl. J. of Services and Standards     Hybrid Journal   (Followers: 1, SJR: 0.13, CiteScore: 0)
Intl. J. of Services Operations and Informatics     Hybrid Journal   (Followers: 1, SJR: 0.106, CiteScore: 0)
Intl. J. of Services Sciences     Hybrid Journal  
Intl. J. of Services Technology and Management     Hybrid Journal   (Followers: 1, SJR: 0.129, CiteScore: 0)
Intl. J. of Services, Economics and Management     Hybrid Journal   (SJR: 0.118, CiteScore: 0)
Intl. J. of Shipping and Transport Logistics     Hybrid Journal   (Followers: 6, SJR: 0.416, CiteScore: 1)
Intl. J. of Signal and Imaging Systems Engineering     Hybrid Journal   (SJR: 0.179, CiteScore: 1)
Intl. J. of Simulation and Process Modelling     Hybrid Journal   (Followers: 5, SJR: 0.259, CiteScore: 1)
Intl. J. of Six Sigma and Competitive Advantage     Hybrid Journal   (Followers: 3, SJR: 0.161, CiteScore: 0)
Intl. J. of Smart Grid and Green Communications     Hybrid Journal   (Followers: 1)
Intl. J. of Smart Technology and Learning     Hybrid Journal   (Followers: 3)
Intl. J. of Social and Humanistic Computing     Hybrid Journal   (Followers: 1)
Intl. J. of Social Computing and Cyber-Physical Systems     Hybrid Journal   (Followers: 1)
Intl. J. of Social Entrepreneurship and Innovation     Hybrid Journal   (Followers: 22)
Intl. J. of Social Media and Interactive Learning Environments     Hybrid Journal   (Followers: 16)
Intl. J. of Social Network Mining     Hybrid Journal   (Followers: 2)
Intl. J. of Society Systems Science     Hybrid Journal  
Intl. J. of Soft Computing and Networking     Hybrid Journal   (Followers: 1)
Intl. J. of Software Engineering, Technology and Applications     Hybrid Journal   (Followers: 4)
Intl. J. of Space Science and Engineering     Hybrid Journal   (Followers: 10)
Intl. J. of Space-Based and Situated Computing     Hybrid Journal   (Followers: 2)
Intl. J. of Spatial, Temporal and Multimedia Information Systems     Hybrid Journal   (Followers: 1)
Intl. J. of Spatio-Temporal Data Science     Hybrid Journal  
Intl. J. of Sport Management and Marketing     Hybrid Journal   (Followers: 10, SJR: 0.377, CiteScore: 1)
Intl. J. of Strategic Business Alliances     Hybrid Journal   (Followers: 3)
Intl. J. of Strategic Change Management     Hybrid Journal   (Followers: 12)
Intl. J. of Strategic Engineering Asset Management     Hybrid Journal   (Followers: 5)
Intl. J. of Structural Engineering     Hybrid Journal   (Followers: 12, SJR: 0.326, CiteScore: 1)
Intl. J. of Supply Chain and Inventory Management     Hybrid Journal   (Followers: 14)
Intl. J. of Supply Chain and Operations Resilience     Hybrid Journal   (Followers: 7)
Intl. J. of Surface Science and Engineering     Hybrid Journal   (Followers: 8, SJR: 0.412, CiteScore: 1)
Intl. J. of Sustainable Agricultural Management and Informatics     Hybrid Journal   (Followers: 1)
Intl. J. of Sustainable Aviation     Hybrid Journal   (Followers: 4)
Intl. J. of Sustainable Design     Hybrid Journal   (Followers: 9)
Intl. J. of Sustainable Development     Hybrid Journal   (Followers: 16, SJR: 0.2, CiteScore: 0)
Intl. J. of Sustainable Economy     Hybrid Journal   (Followers: 1)
Intl. J. of Sustainable Manufacturing     Hybrid Journal   (Followers: 4)
Intl. J. of Sustainable Materials and Structural Systems     Hybrid Journal   (Followers: 3)
Intl. J. of Sustainable Real Estate and Construction Economics     Hybrid Journal   (Followers: 2)
Intl. J. of Sustainable Society     Hybrid Journal   (Followers: 3, SJR: 0.297, CiteScore: 1)
Intl. J. of Sustainable Strategic Management     Hybrid Journal   (Followers: 4)
Intl. J. of Swarm Intelligence     Hybrid Journal   (Followers: 2)
Intl. J. of System Control and Information Processing     Hybrid Journal   (Followers: 3)
Intl. J. of System of Systems Engineering     Hybrid Journal   (Followers: 2, SJR: 0.212, CiteScore: 0)
Intl. J. of Systems, Control and Communications     Hybrid Journal   (Followers: 4, SJR: 0.142, CiteScore: 0)
Intl. J. of Teaching and Case Studies     Hybrid Journal   (Followers: 5)

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Similar Journals
Journal Cover
International Journal of Precision Technology
Number of Followers: 1  
 
  Hybrid Journal Hybrid journal (It can contain Open Access articles)
ISSN (Print) 1755-2060 - ISSN (Online) 1755-2079
Published by Inderscience Publishers Homepage  [449 journals]
  • Modelling of static surface error in end-milling of thin-walled
           geometries
    • Authors: Neha Arora, Ankit Agarwal, K.A. Desai
      Pages: 107 - 123
      Abstract: End milling is commonly employed during fabrication of thin-walled components as it can produce complex shapes in a variety of materials with higher accuracy and productivity. The static deflections of thin-walled components under periodically varying cutting forces are inevitable resulting into surface error and violation of tolerances. This paper presents finite element analysis (FEA) based approach to predict static deflections and resultant surface error during machining of thin-walled components. It has been realised that the axial variation of deflection induced surface error can be linked with cutting conditions. The paper conceptualises various shapes of surface error profile based on similarities of axial and radial engagement. The proposed methodology is implemented in the form of computational models and series of machining experiments are conducted to demonstrate efficacy of the proposed approach. The outcomes of the present study will help process planners in devising strategies to control surface error during milling of thin-walled components.
      Keywords: end milling; workpiece deflections; surface error; thin-walled components
      Citation: International Journal of Precision Technology, Vol. 8, No. 2/3/4 (2019) pp. 107 - 123
      PubDate: 2019-07-19T23:20:50-05:00
      DOI: 10.1504/IJPTECH.2019.100947
      Issue No: Vol. 8, No. 2/3/4 (2019)
       
  • High aspects ratio micro-drilling of super-alloys using ultra
           short pulsed laser
    • Authors: Ganesh G. Dongre, Avadhoot Rajurkar, Ramesh Gondil, Jacob Philip
      Pages: 124 - 141
      Abstract: The demand for high aspect ratio micro holes is growing day by day. Functional micro-holes are necessary for application areas in aeronautic, automobile, semiconductor and biomedical industries. It requires holes with high contour accuracy and minimum thermal damage. Further, the materials used in these applications are alloys, super alloys and composite materials, which are difficult to cut. Laser-machining has demonstrated outstanding capability to generate high precision micro features. The development of femto, pico-second lasers has provided a precise method for micro-fabrication. In this paper, micro-hole drilling was carried out using a 12 W, Ti-sapphire 50-100 fs laser. Holes are analysed for size and shape. It analyses the effect of pulse duration for SS-316L, Inconel-718 and Ti6Al4V. It also investigates effect of laser drilling techniques like percussion, trepanning and helical. Study concludes that with proper control on beam positioning, beam energy and pulse width one can achieve quality holes using ultrafast lasers.
      Keywords: ultra short pulse; aspect ratio; femto and pico-second laser; micro drilling
      Citation: International Journal of Precision Technology, Vol. 8, No. 2/3/4 (2019) pp. 124 - 141
      PubDate: 2019-07-19T23:20:50-05:00
      DOI: 10.1504/IJPTECH.2019.100955
      Issue No: Vol. 8, No. 2/3/4 (2019)
       
  • Development of an ultrasonic vibration assisted minimum quantity
           lubrication system for Ti-6Al-4V grinding
    • Authors: Rajeshkumar Madarkar, Sahaj Agarwal, Sudarsan Ghosh, P. Venkateswara Rao
      Pages: 142 - 157
      Abstract: Minimum quantity lubrication (MQL) is widely used in machining/grinding as a competent cooling-lubrication technique owing to its advantages in terms of better cooling, lubrication, and lower coolant consumption. Ultrasonic vibration can be used to enhance the efficiency of MQL system by atomising the cutting fluid into fine and uniform droplets. In this study, an ultrasonic vibration assisted MQL (UAV-MQL) system is indigenously developed to effectively atomise the cutting fluid using the ultrasonic vibration of a suitably designed horn. To check the effectiveness of the developed UAV-MQL system, a set of experiments have been conducted on Ti-6Al-4V alloy during surface grinding operation, and the results have been compared with dry, flood and air-assisted conventional MQL grinding process using soluble oil as a cutting fluid.
      Keywords: minimum quantity lubrication; MQL; ultrasonic; vibration; atomisation; Ti-6Al-4V; grinding force; surface finish
      Citation: International Journal of Precision Technology, Vol. 8, No. 2/3/4 (2019) pp. 142 - 157
      PubDate: 2019-07-19T23:20:50-05:00
      DOI: 10.1504/IJPTECH.2019.100945
      Issue No: Vol. 8, No. 2/3/4 (2019)
       
  • Contact behaviour of elastic abrasive spheres during self-centring type
           magneto-mechanical deployment for internal bore finishing
    • Authors: Rajeshkumar Madarkar, Sahaj Agarwal, Sudarsan Ghosh, P. Venkateswara Rao
      Pages: 158 - 173
      Abstract: Elastic abrasive finishing, in its various forms, has been demonstrated for micro-finishing of engineering surfaces in the recent past. Conceiving the advantages of elastically controlled abrasion, a deployable type-internal bore finishing tool with self centring magnetic pads to hold elastic abrasive spheres has been introduced in this paper. Contact of such magnetically held elastic abrasives on target surfaces has been simulated, analysed with various contact hypotheses, and supplemented by experimental results. Spring-Dashpot analogy of elastic abrasive contact and characteristics of magnetically controlled abrasive deployment for surface finishing are discussed in detail. Reduced penetration depth of embedded grains due to significant reduction in elastic modulus at contact interface, through the action of elastomeric medium, is illustrated through simulations. With a significantly lower depth of cut under the action of controlled cutting velocity, elastic abrasive spheres are capable of generating fine finish without altering the surface form.
      Keywords: elastic; abrasives; magnetic; deployable; surface; finishing; roughness; contact
      Citation: International Journal of Precision Technology, Vol. 8, No. 2/3/4 (2019) pp. 158 - 173
      PubDate: 2019-07-19T23:20:50-05:00
      DOI: 10.1504/IJPTECH.2019.100931
      Issue No: Vol. 8, No. 2/3/4 (2019)
       
  • Micro-EDM performance of Inconel 718 superalloy with and without
           ultrasonic vibration
    • Authors: Param Singh, Vinod Yadava, Audhesh Narayan
      Pages: 174 - 189
      Abstract: Inconel 718 superalloy is an extremely difficult-to-machine aerospace material due to its work hardening nature and poor thermal conductivity. Drilling of cooling holes in this material is much difficult by conventional drilling processes because it has high chemical affinity with cutting tool materials, high welding action of chips at rake face, high strength at high temperature and work hardening nature. In consideration of all these problems, a self-developed setup of drilling ultrasonic assisted micro-EDM (drilling-UA-micro-EDM) has been used to create microholes in this material. A comparative study of machining characteristics of Inconel 718 in terms of material removal rate (MRR), tool wear rate (TWR), hole taper (T<SUB align="right">a), and radial overcut (ROC) has been investigated due to drilling-micro-EDM without and with the ultrasonic vibration (UV). Comparative results show that the application of UV in drilling-micro-EDM increases MRR and decreases TWR, T<SUB align="right">a and ROC, and gives microholes of good quality and accuracy.
      Keywords: drilling-UA-micro-EDM; hole taper; Ta; Inconel 718 superalloy; drilling-micro-EDM; material removal rate; MRR; radial overcut; ROC; tool wear rate; TWR
      Citation: International Journal of Precision Technology, Vol. 8, No. 2/3/4 (2019) pp. 174 - 189
      PubDate: 2019-07-19T23:20:50-05:00
      DOI: 10.1504/IJPTECH.2019.100949
      Issue No: Vol. 8, No. 2/3/4 (2019)
       
  • Force analysis during spot finishing of titanium alloy using novel tool in
           magnetic field assisted finishing process
    • Authors: Anwesa Barman, Manas Das
      Pages: 190 - 200
      Abstract: Magnetic field assisted finishing process is a nanofinishing process which uses magnetic field for precise control of finishing forces. Magnetorheological fluid mixed with diamond abrasive particles in base medium of glycerol, hydrofluoric acid, nitric acid, and deionised water is used as the polishing medium. The novel tool is a magnet fixture made of mu-metal which is used to hold the magnet during finishing. In the present experimental study, finishing at a spot on flat titanium alloy is carried out to analyse the forces involved in the finishing. Normal force is the main force responsible for the indentation by the abrasive particles on the workpiece surface. Tangential force helps in removing indented material. The measured normal force and tangential force during the spot finishing are 3.285 N and 0.43 N, respectively. The final surface roughness achieved after spot finishing is 10 nm from initial surface roughness of 200 nm. The percentage improvement in surface roughness is 95%.
      Keywords: nanofinishing process; MR fluid; magnetic field assisted finishing; MFAF; finishing force
      Citation: International Journal of Precision Technology, Vol. 8, No. 2/3/4 (2019) pp. 190 - 200
      PubDate: 2019-07-19T23:20:50-05:00
      DOI: 10.1504/IJPTECH.2019.100941
      Issue No: Vol. 8, No. 2/3/4 (2019)
       
  • Fabrication of high aspect ratio cylindrical tungsten micro tool by
           reverse micro-ECM process
    • Authors: Abhijeet Sethi, Biswesh Ranjan Acharya, Partha Saha
      Pages: 201 - 219
      Abstract: The present study was aimed at fabricating high aspect ratio tungsten micro tool using reverse micro-ECM process and studying the effect of different shapes of the brass cathode used on the geometry of fabricated cylindrical tungsten anode. The different shapes of cathode considered were a rectangular block, a wire and a disc. Tungsten rod of 1 mm diameter was first machined to 500 μm and diameter was further reduced below 100 μm by reverse micro-ECM process. The output parameters considered here were the average diameter, aspect ratio, tool diameter at 100 μm from the tip and total tool length. Micro tool with an average diameter of 74.57 μm with an aspect ratio of 26.8 was successfully fabricated using a block cathode in reverse micro-ECM process. Finally, experiments were conducted to study the effect of process parameters like applied voltage and electrolyte concentration with the block-shaped cathode in the machining process.
      Keywords: micro electrochemical machining; micro-ECM; micro machining; tungsten micro tool; high aspect ratio; tool geometry; cathode shape
      Citation: International Journal of Precision Technology, Vol. 8, No. 2/3/4 (2019) pp. 201 - 219
      PubDate: 2019-07-19T23:20:50-05:00
      DOI: 10.1504/IJPTECH.2019.100942
      Issue No: Vol. 8, No. 2/3/4 (2019)
       
  • Electrochemical discharge machining of soda lime glass for MEMS
           applications
    • Authors: Julfekar Arab, Harshit Singh Chauhan, Pradeep Dixit
      Pages: 220 - 236
      Abstract: Electrochemical discharge machining (ECDM) is a process to fabricate micro-features in electrically non-conductive materials like glass, ceramics, etc. These micro-features are useful in the field of microfluidics and micro-electromechanical system (MEMS) packaging. The present study includes the experimental analysis of effects of process parameters such as applied voltage and duty ratio on the machining process. Top and bottom holes diameters are the primary focus in this analysis. Structural characterisation of drilled micro-holes was performed using optical microscopes and scanning electron microscope (SEM) to analyse the surface quality. Energy dispersive X-ray spectroscopic (EDS) analysis of machined glass and needle tool after machining has been performed. An increase in hole diameter was obtained with increment in duty ratio and applied voltage. However, machining results were found to be random at extreme value of 70% duty ratio. Heat affected zone was found to be severe in higher applied voltage and duty ratio. EDS analysis of tool shown the different constituents of debris deposited on it.
      Keywords: electrochemical discharge machining; ECDM; MEMS packaging; hole diameter; applied voltage; duty ratio; surface quality; thermal damage
      Citation: International Journal of Precision Technology, Vol. 8, No. 2/3/4 (2019) pp. 220 - 236
      PubDate: 2019-07-19T23:20:50-05:00
      DOI: 10.1504/IJPTECH.2019.100950
      Issue No: Vol. 8, No. 2/3/4 (2019)
       
  • Influence of wire feed rate on microslit width fabricated by wire ECM
           process
    • Authors: S. Debnath, J. Kundu, B. Bhattacharyya
      Pages: 237 - 248
      Abstract: Miniaturisation of metallic structures has become a prime issue and to meet high demand, modern fabricators extensively use different micro machining techniques. Wire electrochemical machining (wire ECM) is such a process of removing excess material electrochemically. However, the process is still new and further research is needed. Hence, the present work aims in developing suitable wire ECM setup to find out the influence of wire feed rate at varying voltage settings on corresponding width of the generated microslits. For this, experimentations have been carried out with 50 μm dia tungsten wire and machined micro features have been carefully observed under optical microscope. Additionally, the experimental results have been represented graphically where the minimum average width of the microslit is found to be 83.117 μm with an aspect ratio of 1.2. Moreover, complex microfeature with varying width has been fabricated by changing corresponding feed values in a single run.
      Keywords: wire electrochemical machining (wire ECM) process; wire feed rate; applied voltage; microslits; slit width
      Citation: International Journal of Precision Technology, Vol. 8, No. 2/3/4 (2019) pp. 237 - 248
      PubDate: 2019-07-19T23:20:50-05:00
      DOI: 10.1504/IJPTECH.2019.100930
      Issue No: Vol. 8, No. 2/3/4 (2019)
       
  • Localised electrochemical co-deposition of copper-nickel using
           liquid marbles
    • Authors: S. Shailendar, M. Sundaram
      Pages: 249 - 260
      Abstract: A liquid marble is a droplet of liquid coated with microparticles or nanoparticles. A novel method of localised electrochemical co-deposition using liquid marbles and the feasibility of application of this method in additive manufacturing/micro-repair is discussed. Controllability of the transportation of liquid marbles to any desired location by pick and place technique has been demonstrated by depositing a 3 × 3 grid pattern with 1mm period using an in-house built CNC setup. An experimental study was conducted to study the effect of three process parameters viz. duty factor, reaction time and volume of electrolyte on the height of the deposit and ANOVA was performed at 95% confidence level. It was found that the duty factor was the most significant process parameter.
      Keywords: co-deposition; design of experiments; electrochemical additive manufacturing; liquid marble
      Citation: International Journal of Precision Technology, Vol. 8, No. 2/3/4 (2019) pp. 249 - 260
      PubDate: 2019-07-19T23:20:50-05:00
      DOI: 10.1504/IJPTECH.2019.100951
      Issue No: Vol. 8, No. 2/3/4 (2019)
       
  • Femtosecond laser assisted generation of micro-dimples on moly-chrome film
           for improving its tribology
    • Authors: V. Ezhilmaran, N.J. Vasa, L. Vijayaraghavan, Sivarama Krishnan
      Pages: 261 - 278
      Abstract: Femtosecond laser ablation of the moly-chrome deposited piston ring and the influence of laser fluence and number of laser pulses on dimple morphology and geometry were analysed. The increase of laser fluence and pulse numbers beyond 8.4 J/cm<SUP align="right">2</SUP> affected the dimple surface by inducing severe cracks due to heat accumulation. Based on the experimental investigation, the ablation threshold for moly-chrome film was found to be 0.36 J/cm<SUP align="right">2</SUP>. Textured surface was formed on the moly-chrome film with laser fluence near the ablation threshold and the tribological characteristics were studied. The piston ring surface was textured with dimple diameter of 100 μm and dimple aspect ratio of 0.2. Effect of different dimple area ratios, such as 2%, 16% and 38% were analysed by reciprocating type tribology testing. The textured surface with 16% dimple area ratio showed a reduction in friction compared to the plain and the remaining textured piston rings.
      Keywords: surface texturing; micro-dimple; tribology; friction; femtosecond laser
      Citation: International Journal of Precision Technology, Vol. 8, No. 2/3/4 (2019) pp. 261 - 278
      PubDate: 2019-07-19T23:20:50-05:00
      DOI: 10.1504/IJPTECH.2019.100909
      Issue No: Vol. 8, No. 2/3/4 (2019)
       
  • Fibre laser cutting of thick closed cell aluminium foam: morphological
           analysis and its parametric optimisation
    • Authors: Mohammad Shahid Raza, Susmita Datta, Jogender Singh, Partha Saha
      Pages: 279 - 297
      Abstract: Laser cutting of 10 mm thick closed cell aluminium foam was performed using a 2 kW fibre laser. The parameters selected were laser power (1,350 W-1,750 W), scan speed (400 mm/min-1,000 mm/min) and gas pressure (6-8 bar). The kerf quality (kerf width and taper percentage) was assessed by SEM and optical microscopic images. Laser power and scan speed were found to be the most influencing parameters for good kerf quality. SEM images indicate that the dross attachment is higher at the bottom surface than that at the top surface. Parametric optimisation of the kerf width and taper percentage was carried out using response surface methodology (RSM) technique. Regression analysis was performed to correlate input and output parameters in order to apprehend the significance of these parameters. Finally, it was observed that the model was adequate to predict the variability in the response variables at a confidence level of 95%.
      Keywords: fibre laser cutting; closed cell aluminium foam; kerf quality; laser parameters; response surface methodology; parametric optimisation
      Citation: International Journal of Precision Technology, Vol. 8, No. 2/3/4 (2019) pp. 279 - 297
      PubDate: 2019-07-19T23:20:50-05:00
      DOI: 10.1504/IJPTECH.2019.100936
      Issue No: Vol. 8, No. 2/3/4 (2019)
       
  • Nickel stamp fabrication using SU-8 lithography for micro hot-embossing
           serpentine microfluidic channels
    • Authors: Yugandhar Arcot, G.L. Samuel, Lingxue Kong
      Pages: 298 - 311
      Abstract: Mass production of microfluidic devices is the need of the hour considering several applications. Among the various applications, particle inertial focusing is a prospective technique for separation of the particles using microfluidic devices. Serpentine channels have a great potential to utilise particle inertial focusing mechanism, owing to its capability of parallelisation compared to spiral channels. The devices for inertial focusing consist of different features like pillars, channels, and reservoirs where the features are ranging from micro to macro scale. Currently, the devices are fabricated using lithography techniques whose rate of production depends upon the lifespan of the silicon (Si)-master. This paper demonstrates a novel method for fabrication of nickel master used for the micro hot-embossing process on polymethyl methacrylate (PMMA) sheets with micro features. The key parameters of hot-embossing in this study include temperature and pressure which are optimised accordingly.
      Keywords: nickel master; hot-embossing; polymethyl methacrylate; PMMA; serpentine microfluidic channels; micro and macro features
      Citation: International Journal of Precision Technology, Vol. 8, No. 2/3/4 (2019) pp. 298 - 311
      PubDate: 2019-07-19T23:20:50-05:00
      DOI: 10.1504/IJPTECH.2019.100952
      Issue No: Vol. 8, No. 2/3/4 (2019)
       
  • The influence of deep cryogenic treatment and in-situ cryogenic micro
           turning of Ti-6Al-4V on cutting forces, surface integrity and chip
           morphology
    • Authors: T. Jagadesh, G.L. Samuel
      Pages: 312 - 334
      Abstract: The demand for sustainable manufacturing of axi-symmetric, micro turned titanium based neurosurgical implants are increasing. However, dry micro-turning of titanium alloy at higher cutting speeds, results in poor surface integrity, because of continuous saw-tooth chip formation, chip adhesion, and micro-scratch initiation on the machined surface. To overcome these issues in micro-turning, two techniques were attempted in this paper. First, Ti-6Al-4V is cryogenically cooled for 72 hours and then subsequently heat treated for four hours at 170°C before machining. Second, in-situ cryogenic experiments, liquid nitrogen is fed in the cutting zone. It is observed that, in-situ cryogenic micro-turning assists in ease of chip fracture resulting in good surface finish. It inhibits the formation of saw-tooth chip and thereby a fluctuation of forces with time is limited. Micro-scratch and adhesion of machined chips were present in non-treated and deep-cryogenic treated surfaces whereas, in-situ cryogenically micro-turned surfaces were free from the above defects.
      Keywords: micro turning; Ti-6Al-4V; cryogenic treatment; cutting forces; chip morphology; surface finish
      Citation: International Journal of Precision Technology, Vol. 8, No. 2/3/4 (2019) pp. 312 - 334
      PubDate: 2019-07-19T23:20:50-05:00
      DOI: 10.1504/IJPTECH.2019.100956
      Issue No: Vol. 8, No. 2/3/4 (2019)
       
  • Molecular dynamics simulation of mechanical polishing
    • Authors: Prabhat Ranjan, Anuj Sharma, Tribeni Roy, R. Balasubramaniam, V.K. Jain
      Pages: 335 - 353
      Abstract: Mechanical polishing, a nano-finishing process is extensively used for generating smooth surfaces on engineering materials. The mechanism of mechanical polishing is extremely complex due to its random nature of material removal at atomic scale. The need for a better understanding of the process at atomic scale is therefore necessary. Hence, molecular dynamics simulation (MDS) was carried out to understand the behaviour of material removal on two different types of engineering materials viz. aluminium and silicon. In the present work, material removal of rough asperities was modelled and simulated by abrading them with abrasive particles. It was observed that the nanometric abrasion occurs through adhesion de-bonding principle, recoverable phase transformation occurs during the nanometric abrasion on aluminium, and the non-crystalline debris formation during polishing of silicon as brittle crystalline structures. In addition, other attributes are also discussed such as force, stress, chemical stability, effect of abrasive particle, and temperature.
      Keywords: molecular dynamics simulation; MDS; mechanical polishing; nano-finishing; TERSOFF; EAM
      Citation: International Journal of Precision Technology, Vol. 8, No. 2/3/4 (2019) pp. 335 - 353
      PubDate: 2019-07-19T23:20:50-05:00
      DOI: 10.1504/IJPTECH.2019.100932
      Issue No: Vol. 8, No. 2/3/4 (2019)
       
  • Experimental investigations on the effect of relative particle sizes of
           abrasive and iron powder in polishing fluid composition for ball end MR
           finishing of copper
    • Authors: Dilshad Ahmad Khan, Zafar Alam, Faiz Iqbal, Sunil Jha
      Pages: 354 - 364
      Abstract: Demand for ultra-finished copper mirrors is very high in defence and laser optics industries due to their high heat conductivity and durability. In ultra-finishing, soft materials require gentle finishing for scratch free highest degree of surface quality. Ball end magnetorheological finishing is an advanced finishing process that confirms both the requirements of optical industries, i.e., finishing of complex surfaces and up to nanometre level of surface finish. In this study it is explored that the relative particle sizes of the abrasive and the ferromagnetic substance in magnetorheological fluid affect the chain structure and in turn the quality of the finished surface. The study has been carried out over magnetorheological polishing fluids composed of different sizes of iron particles and abrasives. The results show that magnetorheological polishing fluid having iron particles of 300 mesh size and alumina powder of 1,000 mesh size is most suitable combination for best surface finishing on copper samples.
      Keywords: ball end; magnetorheological; surface; roughness; force; iron powder; polishing fluid; normal finishing force; nanofinishing; benzotriazole; magnetic flux density
      Citation: International Journal of Precision Technology, Vol. 8, No. 2/3/4 (2019) pp. 354 - 364
      PubDate: 2019-07-19T23:20:50-05:00
      DOI: 10.1504/IJPTECH.2019.100953
      Issue No: Vol. 8, No. 2/3/4 (2019)
       
  • Effect of polishing fluid composition on forces in ball end
           magnetorheological finishing process
    • Authors: Zafar Alam, Dilshad Ahmad Khan, Faiz Iqbal, Sunil Jha
      Pages: 365 - 378
      Abstract: Ball end magnetorheological finishing is a nanofinishing process that uses magnetorheological polishing (MRP) fluid containing carbonyl iron particles (CIPs) and polishing grade abrasives to remove materials from the workpiece surface. The composition of the MRP fluid greatly influences the finishing forces. Using a dynamometer both normal and shear forces applied by the MRP are recorded on-line. A central composite design of experiments is used to plan the experiments and ANOVA to correlate these forces and process parameters. The process parameters selected here are vol.% of CIPs and vol.% of abrasives which are varied from 5% to 25% and 5% to 20% respectively to measure the forces during experimentation. Both normal and shear forces increase with increase in the CIPs content in the fluid. In case of abrasive concentration, it is observed that the forces initially increase with increase in abrasive content but begins to decline after a certain point.
      Keywords: magnetorheological; polishing fluid; smart fluid; nanofinishing; finishing forces; ball end; abrasives; carbonyl iron particles; CIPs; fluid composition; ball end magnetorheological finishing; BEMRF
      Citation: International Journal of Precision Technology, Vol. 8, No. 2/3/4 (2019) pp. 365 - 378
      PubDate: 2019-07-19T23:20:50-05:00
      DOI: 10.1504/IJPTECH.2019.100946
      Issue No: Vol. 8, No. 2/3/4 (2019)
       
  • Investigation into suitability of electrolytes during surface
           micro-texturing by electrochemical micromachining
    • Authors: S. Kunar, S. Mahata, B. Bhattacharyya
      Pages: 379 - 396
      Abstract: This article highlights the methodical investigation of suitability of various electrolytes on stainless steel by maskless electrochemical micromachining for generation of micro circular pattern. A well planned experimental setup consisting of maskless electrochemical micromachining (EMM) cell with other accessories has been designed and developed for conducting the experiments. A single masked tool with SU-8 2150 mask can generate many high quality textured samples economically. Influences of machining voltage, inter electrode gap, duty ratio and pulse frequency are investigated on material removal rate (MRR) and machining depth of micro circular pattern using three different electrolytes, i.e., NaCl, NaNO<SUB align="right">3 and NaCl+NaNO<SUB align="right">3. Out of these three electrolytes, only mixed electrolyte of NaCl+NaNO<SUB align="right">3 has been preferred as a best electrolyte based on uniform geometrical shape and controlled depth. The minimum size of the texture is 622.45 μm in mean diameter and 50.2 μm in mean depth.
      Keywords: maskless EMM; micro circular pattern; reused masked tool; material removal rate; MRR; depth
      Citation: International Journal of Precision Technology, Vol. 8, No. 2/3/4 (2019) pp. 379 - 396
      PubDate: 2019-07-19T23:20:50-05:00
      DOI: 10.1504/IJPTECH.2019.100954
      Issue No: Vol. 8, No. 2/3/4 (2019)
       
  • Constant work gap perpetuation in ball end magnetorheological finishing
           process
    • Authors: Faiz Iqbal, Zafar Alam, Dilshad Ahmad Khan, Sunil Jha
      Pages: 397 - 410
      Abstract: Ball end magnetorheological finishing (BEMRF) is an advanced finishing method employed for super finishing of flat, curved, intricate and complex surfaces. The surface finish achieved in BEMRF process is governed by machining parameters and fluid parameters. A main contributor towards super finishing by BEMRF process is the work gap. A constant work gap ensures a uniform finishing operation throughout the entire surface; however, there are many cases wherein the work gap between tool tip and workpiece varies over the surface due to geometric form deviations induced by preceding manufacturing process or linear positioner having a tilt error. This paper describes a method to keep a constant work gap for finishing in BEMRF process. A confocal sensor is used to scan the surface in order to detect any height deviations that prevent a constant work gap. Experimental results show a considerable improvement in the surface quality while finishing with perpetuated work gap.
      Keywords: work gap; perpetuation; nano finishing; non-contact measurement; confocal sensor; ball end; BEMRF; automated finishing; surface roughness; surface metrology
      Citation: International Journal of Precision Technology, Vol. 8, No. 2/3/4 (2019) pp. 397 - 410
      PubDate: 2019-07-19T23:20:50-05:00
      DOI: 10.1504/IJPTECH.2019.100943
      Issue No: Vol. 8, No. 2/3/4 (2019)
       
  • Investigation of tool-workpiece interaction in nanoscale cutting:
           a molecular dynamics study
    • Authors: Anuj Sharma, Tribeni Roy, Prabhat Ranjan, Debabrata Datta, R. Balasubramaniam
      Pages: 411 - 428
      Abstract: Ductile and brittle materials differ in their physical and mechanical properties and pose distinct interaction with the cutting tool while nano-machining. It is thus imperative to analyse the mechanism of material removal and tool-workpiece interaction. Towards this, molecular dynamics simulation (MDS) is carried out to study the diamond tool and workpiece interaction in the nanoscale cutting of Cu (ductile material) and Si (brittle material). Results show that material removal in Cu takes place through shear deformation by dislocations formation and their propagation while in case of Si, it takes place through phase transformation of the material in cutting zone. Force analysis of both the materials shows that machinability of Cu in nanoscale cutting is better compared to Si. Furthermore, tool wear while machining of Si with sharp edge tool is due to chipping whereas radial distribution function reveals that graphitisation of the round edge tool occurs during machining of Si.
      Keywords: cutting mechanism; tool wear; molecular dynamics simulation; MDS; diamond turning; nanoscale cutting; subsurface damage; deformation; dislocation; silicon; copper
      Citation: International Journal of Precision Technology, Vol. 8, No. 2/3/4 (2019) pp. 411 - 428
      PubDate: 2019-07-19T23:20:50-05:00
      DOI: 10.1504/IJPTECH.2019.100940
      Issue No: Vol. 8, No. 2/3/4 (2019)
       
  • In situ geometric measurement of microchannels on EN31 steel by laser
           micromachining using confocal sensor
    • Authors: Ashish Kumar Sahu, Faiz Iqbal, Aman Kumar, Sunil Jha
      Pages: 429 - 445
      Abstract: Laser micromachining is a prominent method of fabricating microchannels on a wide range of metals, non-metals, and polymers for biomedical, chemical, fuel-cell applications for flow of liquids and gases in predefined path for microfluidic systems. In situ measurement of precise geometrical features on fabricated channels is required to avoid systematic errors. The geometrical parameters such as width, depth, aspect ratio of microchannels are the most important attributes which greatly influence quality of microchannels. This paper proposes in situ measurement of fabricated microchannels on EN-31 steel using LMM by integrating confocal sensor with micromachining system. Geometrical features have been measured with confocal sensor which is further employed to evaluate aspect ratio (AR). Obtained results are compared with microscopic images of the samples for geometrical features. Confocal sensor used to measure surface roughness. 3D profilometer is used to analyse MRR (based on measured cross section area) and oxidised zone width surrounded to microchannel.
      Keywords: laser micromachining; LMM; microchannel; in-situ measurement; confocal sensor; aspect ratio; metal removal rate; MRR; oxidation zone
      Citation: International Journal of Precision Technology, Vol. 8, No. 2/3/4 (2019) pp. 429 - 445
      PubDate: 2019-07-19T23:20:50-05:00
      DOI: 10.1504/IJPTECH.2019.100948
      Issue No: Vol. 8, No. 2/3/4 (2019)
       
 
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