张永宏,贺志荣

• 1:陕西理工大学材料科学与工程学院

摘要(Abstract)：

利用拉伸试验研究了350～800℃退火态Ti-50.8Ni-0.3Cr合金弹簧在-20～20℃温度范围变形时的低温超弹性。结果表明，在350～800℃温度范围退火时，随退火温度升高，该合金弹簧对外输出应力先降低再升高，而后趋于稳定。在-20～20℃温度范围变形时，随变形温度升高，该合金弹簧对外输出应力增大。要使该合金弹簧在-20℃下获得残余应变较小的超弹性，可对其进行350～400℃或550～800℃退火处理；要使该合金弹簧在-10～20℃下获得残余应变较小的超弹性，可对其进行350～500℃退火处理；要使该合金弹簧在-20～20℃下获得较大的能耗，可对其进行450～800℃退火处理。随退火温度升高，该合金弹簧的应变恢复率降低；随应力-应变循环次数增加，该合金弹簧的应变恢复率先降低后趋于稳定。预循环训练能明显提高该合金弹簧应变恢复率的稳定性。

关键词(KeyWords)： Ti-Ni-Cr合金;形状记忆合金;弹簧;超弹性;退火温度;变形温度

Abstract:

Keywords:

基金项目(Foundation): 陕西省自然科学基金(2012JM6016)

作者(Author): 张永宏,贺志荣

DOI: 10.13289/j.issn.1009-6264.2024-0083

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