Structure design of high-performance Cu-based shape memory alloys
作者： Jian-Xin Xie , Ji-Li Liu , Hai-You Huang
DOI: 10.1007/S12598-015-0557-7
关键词: Structure design 、 Materials science 、 Metallurgy 、 Grain boundary 、 Grain orientation 、 Shape-memory alloy 、 Phase (matter) 、 Grain size 、 Composite material 、 Stress (mechanics) 、 Pseudoelasticity
摘要: The effects of various structure factors on the properties (superelasticity mainly) Cu-based shape memory alloys (SMAs) were systematically evaluated in this review article through literatures combining with our work. It is concluded that besides decisive role grain orientation, boundary (GB) characteristics also play important roles superelasticity, which include GB area, type, morphology and direction descending order effect significance. According to above results, prior principles design are proposed for high-performance SMAs from most least important: (1) obtaining orientation high phase transformation strain; (2) increasing size or reducing area; (3) straight low-energy GBs, especially low-angle GBs; (4) trying make parallel external stress. Consistent main all principles, bamboo-like-grained columnar-grained (CG) show excellent comprehensive properties.
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