| 李强,刘腾飞,王毅豪,胡坤.β钛合金超弹性影响因素及其提高方法[J].有色金属材料与工程,2022,43(1):1-10. |
| β钛合金超弹性影响因素及其提高方法 |
| Influencing factors and improving methods of superelasticity in β titanium alloys |
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| DOI：10.13258/j.cnki.nmme.2022.01.001 |
| 中文关键词: β钛合金 超弹性 马氏体相变 可回复应变 |
| 英文关键词:β titanium alloy superelasticity martensitic transformation recoverable strain |
| 基金项目:上海市自然科学基金资助项目（15ZR1428400）；上海高性能医疗器械材料工程技术研究中心资助项目（20DZ2255500） |
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| 中文摘要: |
| β钛合金具有良好的力学性能、高耐蚀性以及优异的生物相容性，在生物医用材料领域备受关注。β钛合金的超弹性归因于应力诱发的β→α"马氏体相变及其逆转变。阐述了影响β钛合金超弹性的因素，归纳了提高合金超弹性的方法。通过添加合金元素调整相变温度和滑移临界应力使得应力诱发马氏体相变更易发生，延迟β相塑性变形的发生，能够获得更大的相变应变和超弹性回复。通过优化热处理工艺和加工方法调控合金的相组成、晶粒尺寸、位错密度和织构等，也可提高合金的可回复应变，增强合金的超弹性。 |
| 英文摘要: |
| β titanium alloys have attracted great attention in the field of biomedical materials due to the good mechanical properties, high corrosion resistance and excellent biocompatibility. The superelasticity of β titanium alloys is attributed to the stress-induced β→α" martensitic transformation and its reverse transformation. The factors affecting superelasticity of β titanium alloy were expounded, and the methods to improve superelasticity were summarized. By adding alloying elements to adjust the transformation temperature and critical stress for slip, the stress-induced martensitic transformation is easier to occur, the plastic deformation of β phase is delayed, and larger phase transformation strain and superelastic recovery can be obtained. By optimizing the heat treatment process and processing methods to adjust the phase composition, grain size, dislocation density and texture of the alloys, the recoverable strain can be also increased, and the superelasticity of alloys are enhanced. |
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