| 预变形对Ni-Mn-Ga合金马氏体相变的影响 |
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| 引用本文： | 高智勇,蔡伟,赵连城,王文洪,吴光恒,詹文山,沈保根.预变形对Ni-Mn-Ga合金马氏体相变的影响[J].稀有金属材料与工程,2004,33(3):254-257. |
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| 作者姓名： | 高智勇 蔡伟 赵连城 王文洪 吴光恒 詹文山 沈保根 |
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| 作者单位： | 1. 哈尔滨工业大学,黑龙江,哈尔滨,150001
2. 中国科学院物理所,北京,100080 |
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| 基金项目： | 国家自然科学基金资助(5013010) |
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| 摘 要： | 研究了形变对Ni-Mn-Ga合金马氏体相变及其组织形态的影响，并应用马氏体相变热力学和动力学探讨了适当塑性变形后马氏体相变滞后得以大幅度提高的微观本质。结果表明，随着应变量的增加，马氏体相变温度几乎保持不变，而其逆相变温度则迅速升高，塑性应变导致储存在界面处的弹性应变能的释放是塑性变形提高合金相变滞后的主导因素。
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| 关 键 词： | Ni-Mn-Ga合金 马氏体相变 组织形态 相变滞后 弹性应变能 预变形 |
| 文章编号： | 1002-185X(2004)03-0254-04 |
| 修稿时间： | 2002年9月16日 |
Effect of Pre-deformation Strain on Martensitic Transformation of Ni-Mn-Ga Alloy |
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| Gao Zhiyong,Cai Wei,Zhao Liancheng,Wang Wenhong,Wu Guangheng,Zhan Wenshan,Shen Baogen.Effect of Pre-deformation Strain on Martensitic Transformation of Ni-Mn-Ga Alloy[J].Rare Metal Materials and Engineering,2004,33(3):254-257. |
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| Authors: | Gao Zhiyong Cai Wei Zhao Liancheng Wang Wenhong Wu Guangheng Zhan Wenshan Shen Baogen |
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| Abstract: | Using DSC, TEM and compress test, the effect of deformation on martensitic transformation and microstructure of the Ni-Mn-Ga alloy has been investigated. The mechanism of increase of martensitic transformation hysteresis after optimum plastic deformation has been discussed by thermodynamics and kinetics of martensitic transformation. The results show that the martensitic transformation temperatures keep constant, but reverse transformation temperatures sharply increase with an increase of the pre-deformation strain. The increase of transformation hysteresis in the alloy is mainly due to the release of the elastic energy deposited at the boundary induced by the plastic deformation. |
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| Keywords: | Ni-Mn-Ga alloy martensitic transformation transformation hysteresis elastic energy |
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