Microstructure and Transformation Behavior of Ni-Ti-Nb Shape Memory Alloys with Low Nb Content

Acta Metall Sin

2005, Vol. 41

Issue (6): 627-632 DOI:

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Microstructure and Transformation Behavior of Ni-Ti-Nb Shape Memory Alloys with Low Nb Content

YANG Yazhuo; ZHAO Xinqing; MENG Lingjie; YANG Shanglin; XU Huibin

School of Materials Science and Engineering; Beijing University of Aeronautics and Astronautics; Beijing 100083；Electronic Engineering Department; Harbin Engineering University; Harbin 150001

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YANG Yazhuo; ZHAO Xinqing; MENG Lingjie; YANG Shanglin; XU Huibin. Microstructure and Transformation Behavior of Ni-Ti-Nb Shape Memory Alloys with Low Nb Content. Acta Metall Sin, 2005, 41(6): 627-632 .

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Abstract The structure evolution and phase transformation behavior of Ni-Ti-Nb shape memory alloys with 4.5%Nb (atomic fraction) were studied systematically. It is found that the structure evolution as well as the phase transformation characteristics of the alloys is very sensitive to the ratio of the atomic fractions of Ni and Ti. After appropriate predeformation, a wide hysteresis was observed in such low Nb alloys. The difference of the mechanical behaviors of the alloys with austenite or martensite states was investigated at the same temperature, and explained by the kinetics of thermoelastic martensitic transformation.

Key words: shape memory alloy Ni-Ti-Nb martensite

Received: 18 September 2004

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TG139.6

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	YANG Yazhuo
	ZHAO Xinqing
	MENG Lingjie
	YANG Shanglin
	XU Huibin

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https://www.ams.org.cn/EN/ OR https://www.ams.org.cn/EN/Y2005/V41/I6/627

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