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The influence of temperature during water-quench rapid heat treatment on the microstructure, mechanical properties and biocompatibility of Ti6Al4V ELI alloy.

Authors
  • Chafino, J A1
  • Yamanaka, K2
  • Mercier, F3
  • Rivory, P4
  • Balvay, S4
  • Hartmann, D J4
  • Chiba, A2
  • Fabregue, D5
  • 1 Univ Lyon, INSA-Lyon, MATEIS, UMR CNRS 5510, 20 Avenue Einstein, 69621, Villeurbanne, France. Electronic address: [email protected] , (France)
  • 2 Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577, Japan. , (Japan)
  • 3 Univ Lyon, INSA-Lyon, MATEIS, UMR CNRS 5510, 20 Avenue Einstein, 69621, Villeurbanne, France. , (France)
  • 4 Univ Lyon, Universite Claude Bernard Lyon1, MATEIS, UMR CNRS 5510, 8 avenue Rockefeller, 69373, Lyon, France. , (France)
  • 5 Univ Lyon, INSA-Lyon, MATEIS, UMR CNRS 5510, 20 Avenue Einstein, 69621, Villeurbanne, France. Electronic address: [email protected] , (France)
Type
Published Article
Journal
Journal of the mechanical behavior of biomedical materials
Publication Date
Aug 01, 2019
Volume
96
Pages
144–151
Identifiers
DOI: 10.1016/j.jmbbm.2019.04.024
PMID: 31035065
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

This study investigates the influence of a rapid heat treatment followed by water-quenching on the mechanical properties of Ti6Al4V ELI alloy to improve its strength for use in implants. Prior to the experiment, a dilatometry test was performed to understand the progressive α-to β-phase transformation taking place during heating. The results were then used to carry out heat treatments. Microstructure was analysed using SEM, EBSD, EDX and XRD techniques. Vickers micro-hardness, tensile and high cycle rotating bending tests were used to analyse the influence of the $\alpha'$-phase fraction on the strength of the studied alloy. Results show that this process can provide a Ti6Al4V ELI alloy with a better Yield Strength (YS)/uniform deformation (εu) ratio and improved high cycle fatigue strength than those observed in the current microstructure used in medical implants. Lastly, cytotoxicity tests were performed on two types of human cells, namely MG63 osteoblast-like cells and fibroblasts. The results reveal the non-toxicity of the heat-treated Ti6Al4V ELI alloy. Copyright © 2019 Elsevier Ltd. All rights reserved.

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