| Microstructure, Compression Property and Shape Memory Effect of Equiatomic TaRu High Temperature Shape Memory Alloy |
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| 引用本文： | Xin GAO,Yufeng ZHENG,Wei CAI,Su ZHANG and Liancheng ZHAOSchool of Materials Science and Engineering,Harbin Institute of Technology,Harbin 150001,China. Microstructure, Compression Property and Shape Memory Effect of Equiatomic TaRu High Temperature Shape Memory Alloy[J]. 材料科学技术学报, 2004, 20(1): 97-99 |
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| 作者姓名： | Xin GAO Yufeng ZHENG Wei CAI Su ZHANG and Liancheng ZHAOSchool of Materials Science and Engineering Harbin Institute of Technology Harbin 150001 China |
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| 作者单位： | Xin GAO，Yufeng ZHENG，Wei CAI，Su ZHANG and Liancheng ZHAOSchool of Materials Science and Engineering，Harbin Institute of Technology，Harbin 150001，China |
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| 摘 要： | 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,β(parent phase)→β′(interphase) →β"(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 β′→β reversible transformation contributes mainly the shape memory effect, with the maximum completely recovery strain of 2%.
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Microstructure, Compression Property and Shape Memory Effect of Equiatomic TaRu High Temperature Shape Memory Alloy |
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| 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]. Journal of Materials Science & Technology, 2004, 20(1): 97-99 |
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| Authors: | Xin GAO Yufeng ZHENG Wei CAI Su ZHANG Liancheng ZHAO |
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| Affiliation: | School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China |
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| 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%. |
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| Keywords: | TaRu alloy Phase transformation Microstructure Shape memory effect |
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