| Ni_(54)Mn_(25)Ga_(15)Al_6高温形状记忆合金的微观组织和相变行为(英文) |
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| 引用本文： | 辛燕,李岩.Ni_(54)Mn_(25)Ga_(15)Al_6高温形状记忆合金的微观组织和相变行为(英文)[J].中国有色金属学会会刊,2014,24(1):126-130. |
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| 作者姓名： | 辛燕 李岩 |
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| 作者单位： | [1] 华北电力大学 能源动力与机械工程学院,北京102206 [2]北京航空航天大学 材料与工程学院,北京100191 |
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| 基金项目： | Project （51101057） supported by the National Natural Science Foundation of China，Project （12MS10） supported by the Fundamental Research Funds for the Central Universities of China |
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| 摘 要： | 研究Ni54Mn25Ga15Al6高温形状记忆合金的微观组织、马氏体相变特性、力学性能和形状记忆效应。通过与Ni54Mn25Ga21合金对比,分析添加第四组元Al对Ni-Mn-Ga合金性能的影响。结果表明:Ni54Mn25Ga15Al6合金为单一的四方结构非调制马氏体相并呈片状的马氏体孪晶板条形貌。该合金的马氏体相变开始温度超过190°C,具有发展成为高温形状记忆合金的潜力。在Ni-Mn-Ga合金中添加Al会降低马氏体相变温度,这主要归因于Al添加引入的晶格尺寸因素的改变。添加Al元素能有效提高合金的强度和塑性,但降低合金的形状记忆性能。
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| 关 键 词： | 形状记忆合金 Ni-Mn-Ga Al添加 马氏体相变 |
| 收稿时间： | 11 December 2012 |
Microstructure and transformation behavior of Ni54Mn25Ga15Al6 high-temperature shape memory alloy |
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| Yan XIN,Yan LI.Microstructure and transformation behavior of Ni54Mn25Ga15Al6 high-temperature shape memory alloy[J].Transactions of Nonferrous Metals Society of China,2014,24(1):126-130. |
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| Authors: | Yan XIN Yan LI |
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| Affiliation: | 1 School of Energy, Power and Mechanical Engineering, North China Electric Power University, Beijing 102206, China; 2. School of Materials Science and Engineering, B eihang University, Beij ing 100191, China) |
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| Abstract: | The microstructure, martensitic transformation behavior, mechanical properties and shape memory effect of Ni54Mn25Ga15Al6 high-temperature shape memory alloy were investigated. By comparing with the Ni54Mn25Ga21 alloy, the effect of Al addition on the properties of Ni-Mn-Ga alloys was analyzed. The results show that the Ni54Mn25Ga15Al6 alloy has a single-phase tetragonal non-modulated martensite structure with lamellar twins. The martensitic transformation start temperature of this alloy is up to 190 ℃, displaying the promising application as a high-temperature shape memory alloy. Al addition in Ni-Mn-Ga alloy can decrease the martensitic transformation temperatures due to the effect of size factor and improve the strength and plasticity. However, the shape memory effect is reduced remarkably with the Al addition. |
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| Keywords: | Ni-Mn-Ga shape memory alloy Ni-Mn-Ga Al addition martensitic transformation |
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