Browsing by Author "Rajendrachari, S."

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    Investigation of microstructure and mechanical properties of microwave consolidated TiMgSr alloy prepared by high energy ball milling
    (Elsevier B.V., 2022) Pradeep, N.B.; Rajath Hegde, M.M.R.; Rajendrachari, S.; Surendranathan, A.O.
    The nanostructured TiMgSr (at.% 70:10:20) was synthesized by ball milling process followed by cold compaction and microwave sintering. XRD results after 30 h milling showed crystallite size of ⁓41 nm with a lattice strain of 2.5% and evolution of solid solutions like Mg5.2Sr, MgTiO3. The phases formed from 30 h mechanically alloyed powder are in good agreement with TEM SADP results. Consolidation using microwave sintering resulted in the retention of nanostructure with crystallite size of 78 nm and lattice strain of 1.2%. Densification study results in porosity of 19.8% with almost 20% density reduction compared to CP-Ti. The obtained porosity has promoted density reduction along with low elastic modulus that could be biocompatible with human bone tissue. Nanoindentation test results showed a low modulus of 36 ± 7 GPa with a hardness of 1.8 ± 0.8 GPa. These results are comparable with those Ti alloys produced by various techniques and found to be relatively superior for biomedical applications. © 2022
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    Investigation of Structural and Mechanical Properties of Nanostructured TiMgSr Alloy for Biomedical applications
    (AMG Transcend Association, 2023) Pradeep, P.N.; Rajendrachari, S.; Surendranathan, A.O.; Rajath Hegde, M.M.R.
    In this study, Nanostructured TiMgSr alloy is produced by cold Isostatic Pressing (CIP) followed by microwave sintering. The fabricated alloy results in the formation of solid binary solutions along with the elemental phases. The CIP compacted alloy was characterized using X-ray diffraction (XRD) and scanning electron microscopy (SEM) to investigate the phases and the morphology. The presence of intermetallic phases SrTiO3 and Mg17 Sr2 along with elemental Ti, Mg, and Sr crystallites with a narrow peak during the sintering process is prevalent; however, the crystallite size was retained in the nanoscale regime around 58 nm. The developed titanium alloy exhibits a low Young's modulus and good strength. The young's modulus of Ti–Mg–Sr alloys was around 48.11 GPa, significantly closer to human cortical bone (10–30 GPa). Among so far developed Ti-based alloys, the CIP consolidated Ti-Mg-Sr alloy results in low young modulus and hardness. In the future, it may be used practically for biomedical applications. © 2022 by the authors.