[1]吴志刚,任晓兵,刘义农.Ni 50 Mn 38-x In 12 Fe x多晶合金的马氏体转变和磁转变特性[J].中国材料进展,2013,(2):056-60.[doi:10.7502/j.issn.1674-3962.2013.02.07]
　WU Zhigang,REN Xiaobing,LIU Yinong.Martensitic and Magnetic Transformation Behavior of Ni 50 Mn 38-x In 12 Fe x Polycrystalline Alloys[J].MATERIALS CHINA,2013,(2):056-60.[doi:10.7502/j.issn.1674-3962.2013.02.07]
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Ni 50 Mn 38-x In 12 Fe x多晶合金的马氏体转变和磁转变特性()
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中国材料进展[ISSN:1674-3962/CN:61-1473/TG]

卷:
期数:
2013年第2期
页码:
056-60
栏目:
特约研究论文
出版日期:
2013-03-31

文章信息/Info

Title:
Martensitic and Magnetic Transformation Behavior of Ni 50 Mn 38-x In 12 Fe x  Polycrystalline Alloys
作者:
吴志刚; 任晓兵; 刘义农
(1.西安交通大学前沿科学与技术学院 多学科材料研究中心，陕西 西安 710049)
(2.西澳大利亚大学机械工程学院，澳大利亚 克劳利 WA6009)
Author(s):
WU Zhigang;  REN Xiaobing;  LIU Yinong
(1.Multi Disciplinary Materials Research Center, Frontier Institute of Science and Technology, Xi an Jiaotong University, Xi an 710049, China)
(2.School of Mechanical Engineering, The University of Western Australia, Crawley WA6009, Australia)
关键词:
形状记忆合金; 马氏体转变; 磁特性; 金属间化合物
DOI:
10.7502/j.issn.1674-3962.2013.02.07
文献标志码:
A
摘要:
详细研究了Ni 50 Mn 38-x In 12 Fe x (x=0, 3, 4, 5, 6)合金体系中Fe取代Mn对合金马氏体相变行为及磁学性能的影响。发现当x≤4时，合金表现出由B2结构的奥氏体向正交结构的马氏体转变的相变行为，而当x ≥5时该相变被完全抑制。当Fe对Mn的取代超过3%时，合金的显微结构中出现γ相，并发现其数量随Fe含量的增加而增加。γ相的形成改变了合金基体相成分，进而带来了基体相e/a（每原子的电子浓度）值的变化，研究结果证明合金的一系列性能改变均与基体相e/a值的变化相关。第一，基体相e/a（每原子的电子浓度）值随着Fe含量的增加而迅速减小，导致了合金马氏体相变温度、相变潜热及相变熵变的降低。第二，Fe的引入有效地增强了合金基体相的铁磁性能，提高了合金的居里转变温度和合金的磁化强度。详细阐述了Fe的引入是合金马氏体相变及磁学性能变化的本质原因。
Abstract:
The effect of Fe substitution for Mn on the martensitic and magnetic transformation behaviors of Ni50Mn38-xIn12Fex (x=0, 3, 4, 5, 6) polycrystalline alloys was investigated. A martensitic transformation from a B2 austenite to an orthorhombic martensite was observed with lower Fe contents (x≤4), while the transformation was completely suppressed with further increasing the Fe content (x≥5) of the alloys. Substitution of Fe for Mn at above 3%(x) introduced an fcc γ phase in the microstructure, the amount of which increased with increasing the Fe content. The γ phase influenced the composition of the matrix phase, as well as the e/a ratio, leading to a series change of the physical properties of the alloys. Firstly, the e/a ratio of the matrix phase decreased rapidly with increasing Fe content, resulting in the abrupt decrease of martensitic transformation temperature and enthalpy change. Secondly, Fe addition effectively increased the ferromagnetic ordering of the matrix phase, leading to the increase of the Curie transition temperatures and the magnetization of the alloys. The origin of the effect of Fe addition on changes in martensitic transformation and magnetic behaviour is discussed. 
更新日期/Last Update: 2013-02-22