(Ni_(45)Mn_(40)Sn_(10)Co_(5))_(100-x)Gd_(x)合金的微观结构、马氏体相变及力学性能  

Microstructure,martensitic transformation and mechanical property of(Ni_(45)Mn_(40)Sn_(10)Co_(5))_(100-x)Gd_(x)alloys

作　　者：郭珂良 姚梦辉 王明光 从道永[2] 祁阳[1] Guo Keliang;Yao Menghui;Wang Mingguang;Cong Daoyong;Qi Yang(Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education),Northeastern University,Shenyang 110819,China;State Key Laboratory for Advanced Metals and Materials,University of Science and Technology Beijing,Beijing 100083,China)

机构地区：[1]东北大学材料各向异性与织构教育部重点实验室,沈阳110819 [2]北京科技大学新金属材料国家重点实验室,北京100083

出　　处：《材料与冶金学报》2022年第5期342-349,共8页Journal of Materials and Metallurgy

基　　金：新金属材料国家重点实验室开放基金资助项目(2020-Z15).

摘　　要：研究了稀土Gd合金化对(Ni_(45)Mn_(40)Sn_(10)Co_(5))_(100-x)Gd_(x)(x=0,0.1,0.2,0.5,2,原子数分数,下同)磁性形状记忆合金的显微结构、马氏体相变及力学性能的影响.结果表明:低Gd掺杂量(x=0.1,0.2)对合金的相组成和显微组织影响甚微;当x(Gd)≥0.5时,合金中有第二相析出;在各成分合金中均观察到一步热弹性马氏体相变,随着Gd掺杂量的增加,单相合金(x=0~0.2)的马氏体相变温度单调上升,双相合金(x=0.5,2)的马氏体相变温度先下降后上升;适当的Gd掺杂量(x=2)能显著提高合金的压缩强度和延展性.The effects of alloying of rare earth Gd on microstructure,phase transition and mechanical properties of(Ni_(45)Mn_(40)Sn_(10)Co_(5))_(100-x)Gd_(x)(x=0,0.1,0.2,0.5,2,atomic number fraction,the same below)were investigated.The results show that low Gd doping(x=0.1,0.2)has little effect on the phase composition and microstructure of the alloys.When x(Gd)≥0.5,there is a second phase to precipitate in the alloys.One-step thermoelastic martenstic transformation was observed in the alloys with the different Gd content,the martensitic transformation temperatures monotonously increase with the increase of Gd in single phase alloys(x=0~0.2),while the martensitic transformation temperatures decrease first and then increase in the duplex phase alloys(x=0.5,2).Proper addition of Gd element(x=2)can significantly improve the compression strength and ductility.

关 键 词：磁性形状记忆合金 合金化 马氏体相变 微观结构 力学性能 

分 类 号：TG139.6[一般工业技术—材料科学与工程]