Phase transition and mechanical properties of Ni_(30)Cu_(20)Mn_(37+x)Ga_(13-x)(x=0–4.5) alloys  

作　　者：Huan-Fang Wang Jing-Min Wang Cheng-Bao Jiang Hui-Bin Xu 

机构地区：[1]School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics

出　　处：《Rare Metals》2014年第5期547-551,共5页稀有金属（英文版）

基　　金：financially supported by the National Basic Research Program of China (No. 2012CB619404);the National Natural Science Foundation of China (Nos. 50925101, 51221163, and 51001004);Beijing Natural Science Foundation(No. 2132026);the Fundamental Research Funds for Central Universities (No. YWF-12-LZGF-052)

摘　　要：Ni30Cu20Mn37＋xGa13-x（x = 0–4.5） alloys were studied with the phase transformation and mechanical properties. With the increase of Mn content, the martensitic transformation temperatures increase and the Curie temperature decreases. Simultaneously, the room temperature microstructure evolves from single phase of austenite to dual phases containing martensite and precipitation. Both the ductility and the strength of the polycrystalline alloys are significantly improved by the precipitation. Coupled magnetostructural transition from weak magnetic martensite to ferromagnetic austenite is obtained in both single-phase and ductile dual-phase alloys.Ni30Cu20Mn37＋xGa13-x（x = 0–4.5） alloys were studied with the phase transformation and mechanical properties. With the increase of Mn content, the martensitic transformation temperatures increase and the Curie temperature decreases. Simultaneously, the room temperature microstructure evolves from single phase of austenite to dual phases containing martensite and precipitation. Both the ductility and the strength of the polycrystalline alloys are significantly improved by the precipitation. Coupled magnetostructural transition from weak magnetic martensite to ferromagnetic austenite is obtained in both single-phase and ductile dual-phase alloys.

关 键 词：Ferromagnetic shape memory alloys（FSMAs） Martensitic transformation Magnetostructural transition Mechanical properties 

分 类 号：TG139.6[一般工业技术—材料科学与工程]