| 多晶Ni2.1Mn0.9Ca0.9C0.1合金的马氏体相变特征 |
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| 引用本文： | 陆兴,陈晓琴,邱立新,邱明辉,覃作祥.多晶Ni2.1Mn0.9Ca0.9C0.1合金的马氏体相变特征[J].大连交通大学学报,2000,21(4):51-54. |
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| 作者姓名： | 陆兴 陈晓琴 邱立新 邱明辉 覃作祥 |
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| 作者单位： | 1. 大连铁道学院材料科学与工程系，辽宁大连 116028
2. 大连铁道学院文理分院，辽宁大连 116028 |
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| 基金项目： | 辽宁省大连市青年科技基金 |
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| 摘 要： | 采用电阻、热膨胀、磁致伸缩及光学金相等试验方法研究了多晶合金的马氏体相变特征．结果表明：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，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-Ga合金 martensitic transformation magnetostriction NJ-Mn-Ga alloy |
| 文章编号： | 1000-1670(2000)04-0051-05 |
| 修稿时间： | 2000年9月5日 |
The Martensitic Transformation Characterization in a Polycrystal |
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| LU Xing,CHEN Xiao-qing,QIU Li-xin,QIN Zuo-xiang,QIU Minghui.The Martensitic Transformation Characterization in a Polycrystal[J].Journal of Dalian Jiaotong University,2000,21(4):51-54. |
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| Authors: | LU Xing CHEN Xiao-qing QIU Li-xin QIN Zuo-xiang QIU Minghui |
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| Abstract: | The martensitic transformation of a polycrystalalloy has beeninvestigated by using the measurement of resistivity, dilation, magnetostriction and optical microscopyobservation. The results show that there is an unknown transformation below the temperture ofmartensitic transformation between 400K～100K for the alloy. In the case of martensitictransformation, the thermal hysteresis of martensitic transformation is narrow, and the resistivity ofmartensite is higher than that of austenite. The second transformation shows a wider thermalhysteresis, and the resisitivity of new phase is smaller than that of austenite. During the martensitictransformation, both the length of alloy and the magnetostriction decrease along the direction ofsolidification. The morphology of martensites is of parallel plates. |
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| Keywords: | martensitic transformation magnetostriction NJ-Mn-Ga alloy |
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