Effect of shotpeening on sliding wear and tensile behavior of titanium implant alloys |
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| Affiliation: | 1. School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, PR China;2. LEMHE/ICMMO, UMR 8182, Université Paris-Sud 11, 91405 Orsay, France;1. Institute of Physiology, Academy of Sciences of the Czech Republic, Videnska 1083, 142 20 Prague 4, Czech Republic;2. Department of Physics of Materials, Faculty of Mathematics and Physics, Charles University in Prague, Ke Karlovu 5, 121 16 Prague 2, Czech Republic;3. Institute of Materials Science and Engineering, Clausthal University of Technology, Agricolastraße 2/6, 38678 Clausthal-Zellerfeld, Germany;4. Faculty of Engineering, Zagazig University, Zagazig, Egypt;1. Department of Mechanical Engineering, Politecnico di Milano, 20156 Milan, Italy;2. Department of Materials Science and Engineering, Saarland University, 66123 Saarbrücken, Germany;3. Department of Materials and Metallurgy Engineering, University of Oviedo, 33203 Gijón, Spain |
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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. |
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| Keywords: | Shotpeening Microhardness Wear rate Ultimate tensile strength Osseointegration |
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