The Influence of Co Addition on Phase Transformation Behavior and Mechanical Properties of TiNi Alloys

The influences of Co-addition on phase transformation behavior and mechanical properties of TiNi alloys were investigated. Results indicate that, as a substitute for Ni, Co added to TiNi alloys can dramatically decrease the martensite transformation temperature,and R phase transformation and martensite transformation are accordingly separated. When Co-content reach 10 at.%, the martensite transformation temperature is lower than that of liquid nitrogen. During deformation at room temperature, Ti50Ni48Co2 alloy exhibits good ductility with a lower stress plateau caused by stress-induced martensite and martensite reorientation.

作 者： JING Rui-rui LIU Fu-shun   作者單位： School of Materials Science and Engineering, Beijing University of Aeronautics andAstronautics, Beijing 100083, China  刊 名： 中國航空學報(英文版)  ISTIC 英文刊名： CHINESE JOURNAL OF AERONAUTICS  年，卷(期)： 2007 20(2)  分類號： V2  關鍵詞： TiNiCo   shape memory alloy   martensite transformation   mechanical property  

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