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首页> 外文期刊>Materials Science and Engineering >Microstructural evolution and its influence on the mechanical properties of a thermomechanically processed β Ti-32Zr-30Nb alloy
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Microstructural evolution and its influence on the mechanical properties of a thermomechanically processed β Ti-32Zr-30Nb alloy

机译：热加工βTi-32Zr-30Nb合金的组织演变及其对力学性能的影响

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摘要

In this study, microstructural evolution and its influence on the mechanical properties of a newly developed titanium–zirconium–niobium (TZN) alloy after cold rolling and recrystallization annealing have been investigated. With an increase in the cold rolling reduction rate (CRRR) of the Ti–32Zr–30Nb TZN alloy, a change in the plastic deformation mechanisms has been observed. Deformation-induced α” and kink bands were observed in the TZN alloy after cold rolling at 20% and 56% CRRR; however, with a further increase in CRRR, while the deformation mechanisms including kink bands, {332} <113> β mechanical twinning and shear bands were increased, the formation of deformation-induced α” was suppressed. The Young's modulus of the TZN alloy specimen after cold rolling at 86% CRRR was found to be higher than those of the specimens after cold rolling at 20%, 56% and 76% CRRR, due to the reverse transformation of the deformation-induced martensite α” into β. The TZN alloy is evaluated as a promising candidate material for orthopaedic implant applications by virtue of its unique combination of values for Young's modulus, tensile strength, elongation at rupture and elastic admissible strain, which were measured in the ranges of 57–69 GPa, 692–961 MPa, 4–10% and 1.11–1.31%, respectively, after various thermomechanical treatments.
机译：在这项研究中，研究了冷轧和再结晶退火后新开发的钛-锆-铌（TZN）合金的组织演变及其对力学性能的影响。随着Ti–32Zr–30Nb TZN合金的冷轧压下率（CRRR）的增加，已观察到塑性变形机制的变化。在20％和56％的CRRR下冷轧后，在TZN合金中观察到了形变引起的α”和扭结带。然而，随着CRRR的进一步增加，虽然增加了包括扭结带，{332} <113>β机械孪晶和剪切带在内的变形机理，但抑制了由变形引起的α”的形成。由于变形诱发的马氏体的反向转变，发现在86％CRRR的冷轧后TZN合金试样的杨氏模量高于在20％，56％和76％CRRR的冷轧后的试样的杨氏模量。 α”变成β。 TZN合金具有独特的杨氏模量，抗张强度，断裂伸长率和弹性容许应变值的组合，被评估为骨科植入物应用的有前途的候选材料，这些值的测量范围为57–69 GPa，692经过各种热机械处理后，分别为–961 MPa，4–10％和1.11–1.31％。

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