科研之友
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摘要
<正>1. Introduction Ti-Ni-Hf high temperature shape memory alloys have attracted great interests of many researchers due to the higher transformation temperatures and relatively lower cost [1, 2]. However,the recoverable strain is about 3%, which is signifcantly lower than the theoretical value [3-5]. The functional performances of shape memory alloys are closely related to the substructure of twinned martensite and the structure of intervariant interface.
