NiTiNb合金等径角挤压时的变形行为及微观组织演变规律研究  

Deformation Behavior and Microstructure Evolution of NiTiNb Alloy During ECAP

作　　者：倪志铭[1] 王二敏[1] 洪起虎[1] 韩劲[1] 

机构地区：[1]中国航空工业集团公司北京航空材料研究院,北京100095

出　　处：《热加工工艺》2015年第3期150-151,155,共3页Hot Working Technology

摘　　要：研究了等径角挤压(ECAP)对NiTiNb合金的变形行为和微观组织演变规律,并分析了挤压道次对组织的影响。结果表明,挤压过程中载荷先增大后迅速降低,4道次变形后,(Ti,Nb)2Ni硬脆相完全消失。此外,TiNi基体相经ECAP变形后明显细化。The deformation behavior and microstructure evolution of NiTiNb alloy in equal channel angular pressing （ECAP） process were researched. The influence of the extrusion pass on the microstructure was also analyzed. The results show that the load firstly rises up and then decreases immediately. After four-passes ECAP deformation, the （Ti, Nb）2Ni hard brittle phase totally vanishes. Besides ,the TiNi basal phaseis greatly refined after ECAP deformation.

关 键 词：等径角挤压 微观组织 NiTiNb合金 

分 类 号：TG376.2[金属学及工艺—金属压力加工]