王俊,王克鲁,鲁世强,李鑫,欧阳德来,邱仟,高鑫,张开铭

• 1:南昌航空大学航空制造工程学院
• 2:南昌航空大学材料科学与工程学院

摘要(Abstract)：

采用Gleeble-3500热模拟试验机对NiTi形状记忆合金进行了等温恒应变速率压缩试验,研究其在变形温度为700～900℃、应变速率为0.001～10 s~(-1)和最大高度下压量为70%下的高温热变形行为;建立了引入物理参量的应变补偿本构模型。结果表明:合金的流变应力具有负温度相关性和正应变速率敏感性,在应变速率为0.001 s~(-1)时,流变应力曲线呈动态软化特征;考虑物理参量的应变补偿本构模型的相关系数R值为0.982,平均相对误差AARE为6.5%,表明该模型具有较高的预测精度。

关键词(KeyWords)： NiTi形状记忆合金;流变应力曲线;物理本构模型

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51761029);; 南昌航空大学研究生创新专项基金(YC2020026)

作者(Author): 王俊,王克鲁,鲁世强,李鑫,欧阳德来,邱仟,高鑫,张开铭

DOI: 10.13289/j.issn.1009-6264.2021-0317

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