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Journal of Modern Materials
Number of Followers: 0  

  This is an Open Access Journal Open Access journal
ISSN (Online) 2456-4834
Published by AIJR Publisher Homepage  [4 journals]
  • Performance and Prospects of Severe Plastic Deformation for Effective
           Biomedical Titanium Alloys

    • Authors: Wambura Mwiryenyi Mwita, Esther Titilayo Akinlabi, Kazeem Oladele Sanusi
      Pages: 8 - 23
      Abstract: Application of severe plastic deformation (SPD) technology to process effective biomedical titanium alloys has shown promising results at laboratory scale. However, more research is still required before adopting this technology from laboratory scale to industrial scale production. This review presents performance and prospects of SPD for effective ultra-fine/nanograin structure-biomedical titanium alloys. Effective biomedical titanium alloys should have desired properties for the medical application. The properties include; high static and fatigue strengths, surface hardness for wear resistance, good ductility, corrosion resistance and biocompatibility. Based on current works reported in the literature, the review focused on; high-pressure torsion (HPT), equal channel angular pressing (ECAP), asymmetric rolling (AR), accumulative roll bonding (ARB) and repetitive corrugation and straightening (RCS). Overview of biomedical application of titanium alloys and desired material properties is presented. A detail discussion on the working principle, performance (e.g. induced strength, hardness, grain size and texture etc.) and material deformation homogeneity of each SPD method are presented. Also, prospects and challenges of each SPD method to be implemented at industrial scale for continuous and mass production are highlighted. The review concludes with the effectiveness of SPD processes, characteristics of processed samples and suggestion of future work for SPD to process effective biomedical titanium alloys at industrial scale.
      PubDate: 2018-02-26
      DOI: 10.21467/jmm.5.1.8-23
      Issue No: Vol. 5, No. 1 (2018)
       
  • Effect of Electron Beam Irradiation on Polymers

    • Authors: Pradeep Singh, B R Venugopal, D R Nandini
      Pages: 24 - 33
      Abstract: Electron energy loss spectroscopy (EELS) in combination with transmission electron microscopy (TEM) is widely used for chemical state analysis of variety of chemical compounds. High beam sensitivity of substances like polymers hinders the possibility of exploring in-depth analysis provided through the high spatially resolved EELS spectroscopy. In this study, the electron beam irradiation damage on polymers were analyzed with varying dose of electron beams. The stability of the polymers under electron beam exposure depends on the chemical structure on the polymers. In this study the polymers with and without phenyl groups namely Polycarbonate, Polyethylene terephthalate, Polystyrene, Styrene Maleic Anhydride and Polymethylmethacrylate are selected for the comparative degradation study. Effect of varying the electron dose on the stability of polymers were monitored by recording the low-loss EELS spectrum in π to π* transition and (π+σ) to (π+σ)* transition region.
      PubDate: 2018-05-05
      DOI: 10.21467/jmm.5.1.24-33
      Issue No: Vol. 5, No. 1 (2018)
       
  • Epitaxial Lattice Matching and the Growth Techniques of Compound
           Semiconductors for their Potential Photovoltaic Applications

    • Authors: Shagufta Bano Husain, Maruph Hasan
      Pages: 34 - 42
      Abstract: This paper presents the recent advances in semiconductor alloys for photovoltaic applications. The two main growth techniques involved in these compounds are metal organic chemical vapor deposition (MOCVD) and molecular beam epitaxy (MBE), that has also been discussed. With these techniques, hetero-structures can be grown with a high efficiency. A combination of more than one semiconductor like GaAs, InGaAs and CuInGaAs increases the range of their electrical and optical properties. A large range of direct band gap, high optical absorption and emission coefficients make these materials optimally suitable for converting the light to electrical energy. Their electronic structures reveal that they are highly suitable for photovoltaic applications also because they exhibit spin orbit resonance and metal/semiconductor transitions. The dissociation energy has also been discussed in reference to the increased stability of these compounds.
      PubDate: 2018-06-04
      DOI: 10.21467/jmm.5.1.34-42
      Issue No: Vol. 5, No. 1 (2018)
       
  • Effect of Embedded Strain Gage on the Mechanical Behavior of Composite
           Structures

    • Authors: Soufiane Belhouideg, Manuel Lagache
      Pages: 1 - 7
      Abstract: Fiber reinforced composites are increasingly used in several fields such as aeronautics and civil engineering due to their increased strength, durability, corrosion resistance, resistance to fatigue and damage tolerance characteristics. The embedding of sensor networks into such composite structures can be achieved. In the present study, glass fiber reinforced Epoxy composite with integrated strain gage was analysed. Firstly, the mechanical behaviour of this material with embedded strain gage is investigated. The as-prepared samples have been tested under tensile and flexural loading in order to study the effects of the strain gage embedding on the structural stiffness and strength of the composite. It was found that the tensile stiffness decreases by 5.8% and the tensile strength decrease by 1.5% when the strain gage embedded in the material. On the other hand, the flexural strength and stiffness is increased, respectively, by 1.5% and 5.5% with an embedded strain gage. The experiments showed that embedded strain gage is functional and demonstrated the successful integration of sensor networks into composite parts. The obtained results confirm that integrated strain gage can be used for the Structural Health Monitoring (SHM) of glass fiber reinforced Epoxy composite.
      PubDate: 2017-11-06
      DOI: 10.21467/jmm.5.1.1-7
      Issue No: Vol. 5, No. 1 (2017)
       
 
 
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