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The influence of temperature during water-quench rapid heat treatment on the microstructure, mechanical properties and biocompatibility of Ti 6Al 4V ELI alloy

Authors :
Sandra Balvay
Pascaline Rivory
Damien Fabrègue
F. Mercier
J.A. Chafino
D. Hartmann
Akihiko Chiba
Kenta Yamanaka
Matériaux, ingénierie et science [Villeurbanne] (MATEIS)
Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL)
Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon)
Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)
Tohoku University [Sendai]
Source :
Journal of the mechanical behavior of biomedical materials, Journal of the mechanical behavior of biomedical materials, Elsevier, 2019, 96, pp.144-151. ⟨10.1016/j.jmbbm.2019.04.024⟩
Publication Year :
2019
Publisher :
Elsevier BV, 2019.

Abstract

cited By 0; International audience; This study investigates the influence of a rapid heat treatment followed by water-quenching on the mechanical properties of Ti[sbnd]6Al[sbnd]4V 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 α'-phase fraction on the strength of the studied alloy. Results show that this process can provide a Ti[sbnd]6Al[sbnd]4V ELI alloy with a better Yield Strength (YS)/uniform deformation (ε u ) 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 Ti[sbnd]6Al[sbnd]4V ELI alloy. © 2019 Elsevier Ltd

Details

ISSN :
17516161 and 18780180
Volume :
96
Database :
OpenAIRE
Journal :
Journal of the Mechanical Behavior of Biomedical Materials
Accession number :
edsair.doi.dedup.....efc04030894b38d8e590960f3a633a69