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Structure, Phase Composition, and Mechanical Properties of Biocompatible Titanium Alloys of Different Types
Physics of Metals and Metallography ( IF 1.2 ) Pub Date : 2020-05-19 , DOI: 10.1134/s0031918x20040055
A. G. Illarionov , A. G. Nezhdanov , S. I. Stepanov , G. Muller-Kamskii , A. A. Popov

Abstract

The structure and phase composition of biocompatible titanium alloys of composition (wt %) Ti–10Zr–1.2Nb–1.5Al, Ti–6Al–4V (ELI), Ti–15Mo, and Ti–36.1Nb–3.8Zr–2.4Ta–1.9Sn have been studied in a hot-deformed state using scanning electron microscopy and X-ray diffraction analysis. The analysis of mechanical tensile properties has been performed depending on the structure and the aluminum strength equivalent of the alloys. The elasticity moduli of the alloys have been determined using tensile tests, dynamic mechanical analysis, and microindentation; the comparability of values within the error of 3–7% has been established. The nonmonotonic character of the change of the elasticity modulus upon heating to 550°C is explained in terms of the occurrence of processes of stress relaxation and recovery in the Ti–10Zr–1.2Nb–1.5Al, and Ti–6Al–4V ELI alloys and based on the precipitation of the high-modulus ω phase in the Ti–15Mo alloy. For the Ti–36.1Nb–3.8Zr–2.4Ta–1.9Sn alloy, the realization of the elinvar effect has been demonstrated. A correlation of the rate of change in the elasticity modulus with the heating temperature and the ratio of α and β phases in the structure of the alloys has been established.



中文翻译:

不同类型的生物相容性钛合金的结构,相组成和力学性能

摘要

生物相容性钛合金的结构和相组成(wt%)Ti–10Zr–1.2Nb–1.5Al,Ti–6Al–4V(ELI),Ti–15Mo和Ti–36.1Nb–3.8Zr–2.4Ta–已经使用扫描电子显微镜和X射线衍射分析对1.9Sn进行了热变形研究。根据合金的结构和铝强度当量对机械拉伸性能进行了分析。合金的弹性模量已经通过拉伸试验,动态力学分析和微压痕确定。值的可比性在3–7%的误差范围内。在Ti–10Zr–1.2Nb–1.5Al中,应力松弛和恢复过程的发生可以解释加热到550°C时弹性模量变化的非单调性。和Ti-6Al-4V ELI合金,并基于Ti-15Mo合金中高模量ω相的析出。对于Ti-36.1Nb-3.8Zr-2.4Ta-1.9Sn合金,已经证明了elinvar效应的实现。已经建立了弹性模量的变化率与加热温度以及合金结构中α和β相的比例的相关性。

更新日期:2020-05-19
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