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借助ECAP技术对TiNi合金和Ti-Mo基记忆合金在673~773K进行挤压处理,挤压路径为Bc,以获得超细晶组织,从而增强母相的强度,改进材料的性能。研究热力学稳定相及亚稳相对这两种合金的力学性能和马氏体转变的影响。结果表明,对于富钛TiNi合金,热力学稳定相Ti2Ni对马氏体转变及超弹性没有影响,而稳定相α相则可造成Ti-Mo-Nb-V-Al塑性降低。亚稳Ti3Ni4相对富镍TiNi合金的R相变、马氏体转变及超弹性有很大影响。并对第二相对TiNi合金和Ti-Mo基合金力学性能、马氏体转变的影响进行分析。
ECAP technology for TiNi alloy and Ti-Mo-based memory alloy at 673 ~ 773K extrusion process, the extrusion path Bc, to obtain ultra-fine grain structure, thereby enhancing the strength of the mother phase, improve material properties. The effects of thermodynamic stable phase and metastable phase on the mechanical properties and martensitic transformation of these two alloys were investigated. The results show that for the Ti-rich TiNi alloy, the thermodynamically stable phase Ti2Ni has no effect on martensitic transformation and super-elasticity, while the stable phase α-phase can reduce the ductility of the Ti-Mo-Nb-V-Al alloy. Metastable Ti3Ni4 relatively nickel-rich TiNi alloy R-phase transformation, martensitic transformation and super-elastic have a great impact. The effects of the second relative TiNi alloy and Ti-Mo based alloy on the mechanical properties and martensitic transformation were analyzed.