Microstructure, Compression Property and Shape Memory Effect of  Equiatomic TaRu High Temperature Shape Memory Alloy

J Mater Sci Technol ›› 2004, Vol. 20 ›› Issue (01): 97-99.

• Research Articles • Previous Articles Next Articles

Microstructure, Compression Property and Shape Memory Effect of Equiatomic TaRu High Temperature Shape Memory Alloy

Xin GAO, Yufeng ZHENG, Wei CAI, Su ZHANG, Liancheng ZHAO

School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China

Received:1900-01-01 Revised:1900-01-01 Online:2004-01-28 Published:2009-10-10
Contact: Yufeng ZHENG

Abstract

Abstract: The microstructure, phase transformation, compression property and strain recovery characteristics of equiatomic TaRu super high temperature shape memory alloy have been studied by optical microscope, XRD, DTA, compression tests and TEM observations. When cooling the alloy specimen from high temperature to the room temperature, (parent phase)→ (interphase)→ (martensite) two-step phase transformations occur. The microstructure at room temperature show regularly arranged band morphology, with the monoclinic crystal structure. The twinning relationship between the martensite bands is determined to be (101) of Type I. Reorientation and coalescence of the martensite bands inside the variant happened during compression at room temperature. The → reversible transformation contributes mainly the shape memory effect, with the maximum completely recovery strain of 2%.

Key words: TaRu alloy, Phase transformation, Microstructure, Shape memory effect

Xin GAO, Yufeng ZHENG, Wei CAI, Su ZHANG, Liancheng ZHAO. Microstructure, Compression Property and Shape Memory Effect of Equiatomic TaRu High Temperature Shape Memory Alloy[J]. J Mater Sci Technol, 2004, 20(01): 97-99.

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Microstructure, Compression Property and Shape Memory Effect of Equiatomic TaRu High Temperature Shape Memory Alloy

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