| 预加压应力对Ni-Mn-Ga-RE(RE=Tb,Sm)合金磁感生应变的影响 |
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| 引用本文： | 郭世海,张羊换,赵增祺,李健靓,王新林.预加压应力对Ni-Mn-Ga-RE(RE=Tb,Sm)合金磁感生应变的影响[J].材料工程,2005(2):34-36,40. |
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| 作者姓名： | 郭世海 张羊换 赵增祺 李健靓 王新林 |
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| 作者单位： | 1. 钢铁研究总院功能材料所,北京,100081
2. 包头稀土研究院,包头,014010 |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | 研究了稀土元素Tb和Sm对Ni-Mn-Ga磁性形状记忆合金的马氏体相变及磁致应变的影响,并着重研究了预加压应力对合金磁致应变的影响作用.结果发现,微量的稀土元素Tb和Sm的掺入,降低了合金的马氏体相变温度和居里温度.在施加一定的预加压应力后,其磁致应变值有大幅提高,并且大预加压应力在较低磁场下不能使合金产生最大磁致应变,但能够使合金在高磁场作用下获得大磁致应变,所以施加适当的预加压应力是提高合金磁致应变的有效方法.
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| 关 键 词： | Ni-Mn-Ga合金 预加压应力 稀土 磁致应变 形状记忆合金 加压 应力对 高合金 磁感生应变 影响 Strain Stress Effect 方法 磁场作用 低磁场 应变值 压应力 居里温度 马氏体相变温度 掺入 微量 发现 结果 磁致应变 |
| 文章编号： | 1001-4381(2005)02-0034-03 |
Effect of Pre-compressive Stress on Magnetic-field-induced Strain in Ni-Mn-Ga-RE(RE=Tb,Sm) Alloys |
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| Guo Shi-hai,ZHANG Yang-huan,ZHAO Zeng-qi,LI Jian-liang,WANG Xin-lin.Effect of Pre-compressive Stress on Magnetic-field-induced Strain in Ni-Mn-Ga-RE(RE=Tb,Sm) Alloys[J].Journal of Materials Engineering,2005(2):34-36,40. |
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| Authors: | Guo Shi-hai ZHANG Yang-huan ZHAO Zeng-qi LI Jian-liang WANG Xin-lin |
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| Abstract: | The effects of microamount additions of RE(Tb, Sm) on the martensitic transition and the magnetic-field-induced strains of highly textured polycrystalline Ni-Mn-Ga alloys were investigated,and the effects of pre-compressive stress on the magnetic-field-induced strains of the alloys were studied especially. The results show that the addition of RE(Tb, Sm) elements decreases the martensitic transformation temperature and Curie temperature. The magnetic-field-induced strains of the alloys increase remarkably after applying pre-compressive stress on the alloys. Moreover, large pre-compressive stress cant causes the large magnetic-field-induced strains in low magnetic field, but it can induce the largest strains in high magnetic field. Therefore, applying proper pre-compressive stress is an effective way to enhance the magnetic-field-induced strains of the alloys. |
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| Keywords: | Ni-Mn-Ga alloy pre-compressive stress rare earth magnetic-field-induced strain shape memory alloy |
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