NiTi形状记忆合金热-力耦合循环变形行为宏微观实验和理论研究进展  

PROGRESS IN THERMO-MECHANICAL CYCLIC DEFORMATION OF NITI SHAPE MEMORY ALLOY:MACROSCOPIC/MICROSCOPIC EXPERIMENTS AND THEORY

作　　者：康国政[1] 于超[1] 阚前华[1] 

机构地区：[1]西南交通大学力学与工程学院,成都610031

出　　处：《固体力学学报》2015年第6期461-480,共20页Chinese Journal of Solid Mechanics

基　　金：国家自然科学基金重点项目(NSFC11532010)资助

摘　　要：论文对NiTi形状记忆合金热-力耦合循环变形行为研究的最新进展进行综述和评价.首先总结NiTi形状记忆合金在循环加载条件下的单轴、非比例多轴循环变形特性以及强烈的热-力耦合特性,阐述NiTi形状记忆合金在循环变形过程中出现功能性劣化的微观机理;然后,讨论在宏观和细观尺度上建立的三类NiTi形状记忆合金典型的循环本构模型,并评述代表性模型的预测能力;最后,总结已有研究存在的不足,对相关问题的进一步研究提出建议.在本构模型方面主要介绍了作者及其合作者在基于晶体塑性的热-力耦合循环本构模型方面的工作,突出了多种非弹性变形机制和强烈热-力耦合行为对形状记忆合金循环变形行为的影响.Progress in the studies on the thermo-mechanically coupled cyclic deformation of NiTi shape memory alloys （SMAs）is reviewed and commented. At first, the uniaxial and multiaxial cyclic deformation- of NiTi SMAs and its strong thermo-mechanically coupled effect are summarized,and the physical mecha nism of functional degeneration during the cyclic deformation is outlined; then, three types of cyclic consti- tutive models constructed in the macroscopic and microscopic senses, are addressed, and the capabilities of representative models to describe the thermo-mechanical cyclic deformation of NiTi SMAs are verified; fi- nally,some suggestions are presented for the future work by summarizing the shortcomings of existing re- searches. In the content about the constitutive model, the crystal plasticity based thermo mechanical cou- pling ones proposed by the authors and their co-workers are mainly introduced,and the effects of multiple inelastic mechanisms and strongly nonlinear thermo-mechanical coupling on the cyclic deformation of NiTi SMAs.

关 键 词：NITI形状记忆合金 循环变形行为 热-力耦合 本构模型 宏微观分析 

分 类 号：TG139.6[一般工业技术—材料科学与工程]