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Title:: Martensitic Transformation and Shape Memory Effect of Ti Ni Based High Temperature Shape Memory Alloys

作者:: 蔡偉; 孟祥龍; 趙新青; 崔立山; 徐惠彬; (1 哈爾濱工業大學，黑龍江哈爾濱 150001）
（2 北京航空航天大學，北京 100191）
（3中國石油大學，北京 266580)

Author(s):: CAI Wei; MENG Xianglong; ZHAO Xinqing; CUI Lishan; XU Huibin; （1 Harbin Institute of Technology, Harbin 150001, China）
（2 Beihang University，Beijing 100191，China）
（3 China University of Petroleum Beijing ，Beijing 266580，China）

摘要:: 綜述了TiNi基高溫形狀記憶合金中的馬氏體相變和形狀記憶效應最近研究進展。TiNi基高溫形狀記憶合金主要包括用TiNiPd,TiNiPt,TiNiZr和TiNiHf等。對TiNi基高溫形狀記憶合金體材料、薄帶和薄膜中的馬氏體相變、組織結構、形狀記憶效應以及超彈性性能等進行了評述和歸納。值得注意的是，通過適當的時效處理可調節相變溫度，顯著改善TiNiHf高溫形狀記憶合金的開頭記憶效應和超彈性性能，其主要原因在于時效的TiNiHf合金中析出納米級析出相導致基體強度升高。采取適當的制備和加工方法，提高合金的馬氏體相變溫度，改善合金的開頭記憶效應，是當前TiNi基形狀記憶合金研究的主要發展趨勢。

Abstract:: The recent development of TiNibased high temperature shape memory alloys (SMAs) and their applications were reviewed in this paper.The TiNibased high temperature SMAs mainly include TiNiPd,TiNiZr and TiNiHf alloys.The phase transformation temperatures can be adjusted by aging treatment.The martensitic transformation behaviors,microstructure,shape memory effect and superelasticity properties of TiNibased high temperature SMA bulk materials,ribbons and thin films were summarized.The strengthening caused by the precipitation of nanoscale particle during aging in TiNiHf alloys should be responsible for the improvement of shape memory effect and superelasticity properties.It has been presented that finding the ways to increase the transformation temperatrues and improve shape memory effect is the main trend of research and development of TiNIbased high temperature SMAs.