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  Subjects -> SCIENCES: COMPREHENSIVE WORKS (Total: 374 journals)
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Advances in Science and Technology
Number of Followers: 16  
 
  Full-text available via subscription Subscription journal
ISSN (Online) 1662-0356
Published by Scientific.Net Homepage  [14 journals]
  • Estimation of Effect of Cold Forging Deformational Behavior on Al-2024
           Alloy Reinforced with Fly-Ash Particulates

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      Abstract: Publication date: 26 September 2022
      Source: Advances in Science and Technology Vol. 120
      Author(s): Sivasankara Raju, Ch. Lakshmi Srinivas, Srinivasa Rao Gunji, T. Srinag, Meda Chandra Shekhar, Timothi Pandi
      This work emphasize on utilization of fly ash in to novel aluminium alloy (Al-2024). The Al-2024 alloy and composites (≈10%flyash) prepared by stir casting technique. The composites is cold forged and identified properties (mechanical, structural and stress distribution in component). Upset tests at room temperature, during the deformation process, provide representative behaviour. The metallographic structure of alloy revelled dendritic and composites shows fine spherical prime segment split and regularly dispersed intermetallic compounds. The stress intensity and distribution of temperature were examined in depth at different input combinations. Compression tests were conducted on Ø 12 mm cylindrical specimens at an H/D ratio of 1.0 and 1.5 for alloy and fly ash composites (2, 6 and 10 wt %). In determining the forging load, the upset ratio defined as the mainly important factor. The strain in composites increased with increasing % of reduction in size and decreased with % of fly ash.


      PubDate: Mon, 26 Sep 2022 00:00:00 +020
       
  • A Review of Aluminum-Super Extended Graphite Based Metal Matrix Composite
           Material

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      Abstract: Publication date: 26 September 2022
      Source: Advances in Science and Technology Vol. 120
      Author(s): M. Sakthideepan, P. Nagendran
      Graphene is a wonder material, and it has remarkable mechanical property not only limited to few kind of mechanical properties. This included electrical, optical, thermal capability and resistivity. It is hypothetically an excellent method to approach with Reinforcement in metal matrix composites. This paper totally depends on review of Aluminum – super extended graphite material, super extended graphite is commonly known as a ‘Graphene’. This paper focuses on the review about fabrication methodology and problems faced in fabrication of Al-Graphene based composite, and we analyzed flexible and high possible path to economic consideration. This article covers a step-by-step process for enhancing a composite material for a commercial application. In this study analysis, the mechanical behavior of aluminum-graphene composite is made by potentially reinforced metal matrix method with particulate stir casting method. The main objective of this study is to provide the functional process of graphene based composite effectively. The aluminum (Al-7075 Alloy) is a metal matrix and has 1% of graphene. In recent decades, a hype of graphene material and carbon nano tubes have come due to technological advancement as it leads to commercial establishment. Composite material played the important role in the recent years to replace the traditional material in the easiest manner. Graphene based composite has wide variety of uses and enormous applications to drive for a better future.


      PubDate: Mon, 26 Sep 2022 00:00:00 +020
       
  • Mechanical Properties of Sisal and Corn Starch Mixed Polymer Matrix
           Composites Using Experimental and Micromechanics

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      Abstract: Publication date: 26 September 2022
      Source: Advances in Science and Technology Vol. 120
      Author(s): Dadı Nokesh, Jaya Madhuri Mandava, Chokkara Mahesh, Kallepalli Mani Naga Kumar, Mohammed Abdul Rahim Ahmed, Nersu Lokesh, Tadavarthi Yuva Kiran Naga Venkata Sai Ganesh, P. Phani Prasanthi
      The usage of reinforcing fibers extracted from nature is increasing in the present decade due to increasing the demand for biodegradability and environmentally friendly materials. In this paper, biodegradable sisal fiber and corn starch powder mixed thermoset and thermoplastic composite are prepared and tested for Young’s modulus. The effect of sisal fiber weight fraction on the Young’s modulus is identified at constant content of corn starch powder. Later, using Micromechanics approach and Finite Element Method simulation studies are performed to estimate transverse Modulus, Shear modulus, major and minor Poisson’s ratio of the sisal and starch based polymer composites. It is found that the composites prepared with sisal fiber and corn starch powder are a promising replacement for plastic reinforced composite to promote the biodegradability, especially under high weight fraction of sisal fiber


      PubDate: Mon, 26 Sep 2022 00:00:00 +020
       
  • Characterization of CP-Ti Processed by Micro Arc Oxidation for Bone
           Implant Applications

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      Abstract: Publication date: 26 September 2022
      Source: Advances in Science and Technology Vol. 120
      Author(s): Chelamalasetti Pavan Satyanarayana, Lam Ratnaraju, Lam Suvarna Raju, Sreekanth Dondapati, Ravikumar Dumpala, Ratna Sunil Buradagunta
      Titanium and its alloys are potential candidates widely used to manufacture medical implants. In spite of possessing excellent properties suitable for a biomaterial, Ti suffers from lack of ability to bond with the local tissue termed as “bioactivity”. Several strategies have been adopted to increase the bioactivity of titanium for bone implant applications. Micro arc oxidation (MAO) is one of such promising surface treatments which produces an oxide layer on the surface of Ti which promote better tissue interactions at the surface Ti. Hence, in the present work, commercial pure Ti (CP-Ti) has been treated with MAO process and the produced surface was characterized to study the oxide layer developed on the Ti surface. X-Ray diffraction studies demonstrated the formation of TiO2 layer on the surface of CP-Ti. Scanning electron microscope images and EDS analysis confirms the porosity in the produced oxide layer which is favorable towards better cell interactions. The presence of considerable amount of phosphorous in the oxide layer which is form the electrolyte used during MAO process was also observed. The preliminary findings demonstrate the simple and effective way to produce porous oxide layer on Ti for biomedical applications.


      PubDate: Mon, 26 Sep 2022 00:00:00 +020
       
  • Investigations on Wear and Friction Characteristics of AA-2024/MOS2/Al2O3
           HMMCs

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      Abstract: Publication date: 26 September 2022
      Source: Advances in Science and Technology Vol. 120
      Author(s): Ch. Lakshmi Srinivas, D. Vijay Praveen, Gamineni Suresh, Ravuri Gowtham, Ragala Siddu, Bandi Ravi Teja, Thambi Babu Remalli
      Upgrading of reinforcements with suitable combinations in Aluminum-based hybrid metal matrix composites became a key area of research in the current manufacturing era. These advanced materials have enriched Properties like specific strength, wear resistance, and low thermal expansion. With these perceptions, the current research paper was focused on AA-2024/MoS2/Al2O3 HMMCs. Taguchi L18 orthogonal array was adopted to design the experiments. Hybrid composites containing MoS2 and Al2O3 reinforcements were fabricated by the stir casting method. The pin on disk tribometer was used for finding the wear rate and coefficient of friction of prepared composites by considering sliding speed, applied load, and sliding time as wear parameters. Further, the influence of wear parameters on Wear Rate and Coefficient of Friction (COF) was presented. Consequently, the significance of the parameters on wear rate and COF are analyzed by analysis of variance (ANOVA).


      PubDate: Mon, 26 Sep 2022 00:00:00 +020
       
  • Particulate Based AZ91 Magnesium Hybrid Composites – A Short Review

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      Abstract: Publication date: 26 September 2022
      Source: Advances in Science and Technology Vol. 120
      Author(s): T. Naveen Kumar, S. Vinod Kumar, V. Dola Siva Krishna, Sk. Mohammad Irfan, Devarakonda Sameer Kumar
      The present paper deals with the study of magnesium alloy hybrid composites. AZ91 is a popular magnesium alloy with good specific strength at room temperatures. However, it suffers with poor mechanical properties at elevated temperatures. The reinforcement materials can be prepared by polymers and ceramic particles. The selection of proper material will have a greater response on the properties. Therefore, in order to increase the mechanical responses, preparation of composites is good idea with low cost. To ensure multiple properties, it is always necessary to go with Hybrid composites. In this context, this paper reviews the materials used in the fabrication of composites, fabrication Techniques, microscopic behaviours and mechanical responses. This paper also provides research potentials along with the latest developments in the area of AZ91 Composites.


      PubDate: Mon, 26 Sep 2022 00:00:00 +020
       
  • Developing Mg Based Composites for Degradable Orthopedic Implant
           Applications: A Review

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      Abstract: Publication date: 26 September 2022
      Source: Advances in Science and Technology Vol. 120
      Author(s): Venkateswarlu Badisha, Suni Kumar Rajulapati, Ratna Sunil Buradagunta
      Research on developing degradable implants from metals is one of the potential research fields in the biomedical engineering. Magnesium (Mg), iron (Fe) and zinc (Zn) are the three metallic systems widely investigated as potential materials to manufacture degradable orthopedic and stent applications. Among them, magnesium-based implants have shown promising properties suitable for orthopedic and stent applications. In spite of several benefits such as biocompatibility, non-toxicity and degradability, magnesium is associated with a few limitations including rapid corrosion and evolution of hydrogen during the degradation in the biological environment. Several materials engineering strategies have been employed to address the limitation of magnesium. Developing composites by incorporating suitable reinforcements into Mg is such promising route to develop Mg based implants with tailored properties. The present review provides a snap shot of the developments reported in development of Mg based composite for degradable implant applications. Different phases used to incorporate into Mg and the influenced properties with the future scope and the challenges are presented.


      PubDate: Mon, 26 Sep 2022 00:00:00 +020
       
  • Comparative Study on the Biodegradation Behavior of Pure Mg in NaCl
           Solution and Simulated Body Fluids

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      Abstract: Publication date: 26 September 2022
      Source: Advances in Science and Technology Vol. 120
      Author(s): Voleti Sri Sai Harsha Vardhan, Ambuj Sharma, Sathish Tiruveedhula, Ratna Sunil Buradagunta
      Developing Mg based implants for temporary applications based on their biodegradation in the physiological environment is a potential research area in the biomedical engineering. Assessing the bio-corrosion in simulated conditions helps to reduce the complexity of research studies associated with in-vivo experiments and can be used to assess the true behavior of the Mg implant in artificial solutions. On the other hand, assessing the corrosion behavior by using 3.5% NaCl solution is a standard ASTM protocol widely used in the industries. Hence, in the present work, degradation of pure Mg due to bio-corrosion in two different solutions i.e simulated body fluids (SBF) and 3.5% NaCl solution has been investigated. From the results, the weight loss measurements indicated higher degradation during the initial 24 h in SBF solution. However, with the increased immersion time to 72 h, due to the deposition of mineral phases from SBF as confirmed from the electron microscopy and X-Ray diffraction study, the degradation was observed as decreased in SBF compared with NaCl solution. Hence, the results demonstrate that the evaluation of degradation behavior of Mg based materials in simulated physiological environments is appropriate compared with the standard NaCl environment.


      PubDate: Mon, 26 Sep 2022 00:00:00 +020
       
  • Micro Structural and Hardness Study of Al 6065 and CaSiO3 Composite with
           Stir Casting Route

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      Abstract: Publication date: 26 September 2022
      Source: Advances in Science and Technology Vol. 120
      Author(s): M. Ashok Babu, M. Yuvaraju, K. Ajay Babu, G. Rama Krishna, Devarakonda Sameer Kumar, Vemula Venkata Kondaiah
      Present usage of Metal Matrix Composites is high in engineering applications. Especially, Al 6065 aluminum alloy is finding suitable for many applications of engineering components. In this work, a metal matrix composite has prepared with the pure Al 6065 aluminum alloy as matrix and Calcium silicate (CaSiO3) as reinforcement using bottom pour stir casting machine. The percentage of Calcium silicate (CaSiO3) has been increased from 1 % to 4 % in steps of 1% by weight. The reinforcement has been distributed over the matrix for which micro structural analysis and hardness test has been performed. The hardness values are found to be increasing with increase of reinforcement.


      PubDate: Mon, 26 Sep 2022 00:00:00 +020
       
  • Analysis of Functionally Graded Cylinders Subjected to Internal Pressure

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      Abstract: Publication date: 26 September 2022
      Source: Advances in Science and Technology Vol. 120
      Author(s): Udayagiri Vijay Venkata Siva Sai, Datti Naga Venkata Ravi Dileep Kumar, V. Narasimha Rao, Bandaru Satya Durga Prasad, P. Ravi Kumar
      In the present study, A functionally graded cylinder subjected to internal pressure has been analyzed using the finite element method based software ANSYS. The variations of properties of the functionally graded material are considered based on a power-law function. The inner and outer surfaces of the cylinder are made of alumina and C45 steel respectively. The continuous composition of the two materials has been considered in the form of varying elastic modulus and Poisson’s ratio along the radial direction as the power-law function. The result of present approach is compared with analytical result of available literature. The comparison represents good coincidence between analytical and numerical results and confirms the accuracy of solutions presented in the present approach for cylinder made up of FGM. Further the stress distribution of FGM made cylindrical shell for given pressure load conditions have analyzed. Stress distributions along the radial direction are studied. The obtained result shows that the property of FGMs has a significant influence to the deformation and stress distribution along the radial direction. Numerical results presented are useful for engineer to design a cylinder made of FGMs


      PubDate: Mon, 26 Sep 2022 00:00:00 +020
       
  • Optimization of Time, Part Accuracy and Surface Roughness of TI-6AL-4V
           Processed through SLM

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      Abstract: Publication date: 26 September 2022
      Source: Advances in Science and Technology Vol. 120
      Author(s): Kandula Reddy, Doddi Martin Johnson, Inampudi Pritham, Kowtarapu Lokesh, Tata Nancharaiah
      Selective Laser Melting (SLM) is an Additive Manufacturing (AM) technique that uses a laser to selectively melt metallic powder in a layer-wise manner, in order to produce functional metal components. It offers great freedom in design and facilitates fast iterations, with the potential of speeding up development phases throughout a wide range of industries. Despite these opportunities, its application into industry is limited. One of the problems that are a limiting factor is dimensional accuracy, production time and surface roughness that are introduced to the components during manufacturing. In this work it is focused on to study the influence of process parameters and laser scanning strategy on the build time, part accuracy and surface roughness of as-fabricated Ti-6Al-4V alloy samples through SLM. The specimens are designed and fabricated at various levels of Layer thickness, Laser power and Scanning strategy and its effect on build time,part accuracy and surface roughness are studied


      PubDate: Mon, 26 Sep 2022 00:00:00 +020
       
  • Experimental Investigation of Optimization of Machining Parameters in
           Abrasive Water Jet Machining

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      Abstract: Publication date: 26 September 2022
      Source: Advances in Science and Technology Vol. 120
      Author(s): S. Naga Kumar, P. Sasidhar, M. Rajyalakshmi, K.I. Vishnu Vandana
      Now a days, Non-Conventional Machining process is gaining more attention by the researchers. Abrasive Water jet machining (AWJM) is one of such machining process where material is removed with abrasive slurry as cutting tool. The present work discuss about the development of an optimal solution for minimizing surface roughness using a response surface methodology (RSM) while machining of EN grade steel. The machining parameters considered for the study are Abrasive Grain Size (AGS) and Hydraulic Pressure (HP) and Stand Off Distance (SOD) and the Abrasive Flow Rate (AFR). The response parameter is surface roughness (Ra). The experiments are performed based on the Box-Behnken design. Additionally, the significance of the developed optimization design has been identified using analysis of variance (ANOVA). Finally, the validity and adequacy of the developed model are done through confirmation tests. Key Words: Abrasive Water jet Machining, Response Surface Methodology, Optimization, ANOVA


      PubDate: Mon, 26 Sep 2022 00:00:00 +020
       
  • Optimal Surface Finish of Material Extrusion 3D Printed Products Using
           Ultimaker Cura Interface

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      Abstract: Publication date: 26 September 2022
      Source: Advances in Science and Technology Vol. 120
      Author(s): Salkapuram Vijay, G. Ganesh, Goparaju Navaneeth, A. Vengala Naidu, G. Achuth Kumar
      Rapid prototyping and additive manufacturing are the emerging trends in due to fast updating technology in all processing areas. An attempt is made in this paper to find the optimum parameters like layer thickness, infill pattern, ironing settings in Cura software interface. Two different filament material Polylactic Acid (PLA) and Acrylonitrile Butadiene Styrene (ABS) materials are selected to make the products. The objective is to get fine surface finished products at the outer surface of the components. Keeping the machine parameters constant, the fabrication parameters of components are varied by Cura software interface. The surface finish of the components made is measured with surf-tester. It is observed that the smooth surface finish of 2.159 μm is obtained for ABS as filament material, line fill pattern, smaller internal layer thickness and larger top and bottom layer thickness.


      PubDate: Mon, 26 Sep 2022 00:00:00 +020
       
  • WEDM Parametric Study on Machining Responses of AA-6082/MoS2/Al2O3 HMMCs

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      Abstract: Publication date: 26 September 2022
      Source: Advances in Science and Technology Vol. 120
      Author(s): Ch. Lakshmi Srinivas, N. Bharat Kumar, N. Brahmaiah, P. Siva Kumar, P. Abhinash, D. Vijay Praveen
      The current research paper was focused on investigating the influence of wire electrical discharge machining parameters on machining responses of AA-6082/MoS2/Al2O3 Hybrid Metal Matrix Composites (HMMCs). In this paper, Taguchi L18 (2^1 ×3^4) orthogonal array was adopted to conduct the experiments. From the experimental investigations, it was observed that the electrode wire type, pulse on time, and pulse off time have shown a remarkable effect on the machining responses. Keywords: Al-MMC, AA-6082, Stir casting, MRR, Taguchi method


      PubDate: Mon, 26 Sep 2022 00:00:00 +020
       
  • Semi Active Vibration Control Device for Secondary Suspension of a Railway
           Wagon to Improve Ride Comfort

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      Abstract: Publication date: 26 September 2022
      Source: Advances in Science and Technology Vol. 120
      Author(s): Ravi Kumar Tadepalli, C.S.P. Rao, K. Narayana Rao, Dva Rama Sastry
      The rail irregularities and wheel-rail interactions in a train running at high speeds may result in large-amplitude vibration in the train's car body and affect passengers by reducing ride comfort. The train suspension systems have a vital role in reducing the vibration and improving ride comfort to an acceptable level. The existing passive viscous dampers have limited scope of achieving this objective. In this paper Magnetorheological (MR) dampers as semi-active control devices for secondary suspension in a railway wagon are used for achieving better ride performance parameters. Compared the ride comfort parameters of the wagon with MR dampers against the conventional passive viscous dampers. The sprung mass acceleration, displacement and suspension travel are assessed for three different control strategies, skyhook, ground hook and hybrid. Matlab/Simulink software is used for simulation of the wagon suspension system.


      PubDate: Mon, 26 Sep 2022 00:00:00 +020
       
 
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