Effect of shotpeening on sliding wear and tensile behavior of titanium implant alloys

B.K.C. Ganesh, W. Sha, N. Ramanaiah, A. Krishnaiah

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    Abstract

    Titanium has good biocompatibility and so its alloys are used as implant materials, but they suffer from having poor wear resistance. This research aims to improve the wear resistance and the tensile strength of titanium alloys potentially for implant applications. Titanium alloys Ti–6Al–4V and Ti–6Al–7Nb were subjected to shotpeening process to study the wear and tensile behavior. An improvement in the wear resistance has been achieved due to surface hardening of these alloys by the process of shotpeening. Surface microhardness of shotpeened Ti–6Al–4V and Ti–6Al–7Nb alloys has increased by 113 and 58 HV(0.5), respectively. After shotpeening, ultimate tensile strength of Ti–6Al–4V increased from 1000 MPa to 1150 MPa, higher than improvement obtained for heat treated titanium specimens. The results confirm that shotpeening pre-treatment improved tensile and sliding wear behavior of Ti–6Al–4V and Ti–6Al–7Nb alloys. In addition, shotpeening increased surface roughness.
    Original languageEnglish
    Pages (from-to)480–486
    Number of pages7
    JournalMaterials and Design
    Volume56
    Early online date01 Dec 2013
    DOIs
    Publication statusPublished - Apr 2014

    Keywords

    • Shotpeening
    • Microhardness
    • Wear rate
    • Ultimate tensile strength
    • Osseointegration

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