| 多晶Ni2.1Mn0.9Ga0.9C0.1合金的马氏体相变特征 |
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| 引用本文： | 陆兴,邱明辉.多晶Ni2.1Mn0.9Ga0.9C0.1合金的马氏体相变特征[J].大连铁道学院学报,2000,21(4):51-54,68. |
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| 作者姓名： | 陆兴 邱明辉 |
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| 作者单位： | [1]大连铁道学院 [1] |
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| 摘 要： | 采用电阻、热膨胀、磁致伸缩及光学金等试验方法研究了多晶Ni2.1Mn0.9Ga0.9C0.1合金的马氏体相变特征。结果表明：Ni2.1Mn0.9Ga0.9C0.1合金在400～100K之间发生两次相变，第一次为马氏体相变，它的热滞后比较小，马氏体相的电阻率高于母相的电阻率；而第二次相变的结构变化尚未澄清，它的热滞后比较大，新相的电阻率低于母相的电阻率。马氏体相变时，合金结晶方向长度收缩，磁致伸缩急剧减小。合金中马氏体基本为相互平行的片状组织。
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| 关 键 词： | 马氏体相变 磁致伸缩 Ni－Mn－CA合金 磁形状记忆合金 相变温度 相变特征 |
The Martensitic Transformation Characterization in a Polycrystal Ni_(2.1)Mn_(0.9)Ga_(0.9)C_(0.1) Alloy |
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| LU Xing,CHEN Xiao-qing,QIU Li-xin,QIU Minghui,QIN Zuo-xiang.The Martensitic Transformation Characterization in a Polycrystal Ni_(2.1)Mn_(0.9)Ga_(0.9)C_(0.1) Alloy[J].Journal of Dalian Railway Institute,2000,21(4):51-54,68. |
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| Authors: | LU Xing CHEN Xiao-qing QIU Li-xin QIU Minghui QIN Zuo-xiang |
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| Abstract: | The martensitic transformation of a polycrystal Ni2.1Mn0.9Ga0.9C0.1 alloy has been investigated by using the measurement of resistivity, dilation, magnetostriction and optical microscopy observation. The results show that there is an unknown transformation below the temperture of martensitic transformation between 400K - 100K for the alloy. In the case of martensitic transformation, the thermal hysteresis of martensitic transformation is narrow, and the resistivity of martensite is higher than that of austenite. The second transformation shows a wider thermal hysteresis, and the resisitivity of new phase is smaller than that of austenite. During the martensitic transformation, both the length of alloy and the magnetostriction decrease along the direction of solidification. The morphology of martensites is of parallel plates. |
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| Keywords: | martensitic transformation magnetostriction Ni-Mn-Ga alloy |
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