Strain-magnetization property of Ni-Mn-Ga(Co,Cu) microwires  

作　　者：Zhi-Yi Ding Jia-Jie Gao Zeng-Bao Jiao Hong-Hui Wu Ai-Ying Chen Jie Zhu 

机构地区：[1]State Key Laboratory for Advanced Metals and Materials,University of Science and Technology Beijing,Beijing,100083,China [2]School of Materials Science and Chemistry,University of Shanghai for Science and Technology,Shanghai,200093,China [3]Department of Mechanical Engineering,The Hong Kong Polytechnic University,Hong Kong,999077,China [4]School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing,100083,China

出　　处：《Rare Metals》2023年第1期244-253,共10页稀有金属（英文版）

基　　金：financially supported by the National High Technology Research and Development Program of China (No.2015AA034101);the State Key Laboratory for Advanced Metals and Materials (No.2018Z-26);the National Natural Science Foundation of China (No.51771121);the Science and Technology Commission of Shanghai Municipality (No.20ZR1437500)。

摘　　要：Magnetization associated with reversible phase transformation or rearrangement of martensite variants of two kinds of shape memory alloys under the coupling of tensile stress were investigated.One is the austenitic Ni_(46)Mn_(28)Ga_(20)Co_(3)Cu_(3)micro wire with the [001] preferred orientation,which exhibits enhanced cyclic stability and large fully recoverable strain(> 8%) due to the stress-induced reversible martensitic transformation at room temperature.The other is the Ni_(54)Mn_(24)Ga_(22)microwire with ferromagnetic martensitic phase,which has preferential orientation and also exhibits large tensile strain.Based on the improved mechanical properties,the strain-magnetization effect of the two kinds of microwire under the coupling of orthogonal magnetic field and tensile stress was performed and the results indicate that the magnetization decreases with the increase of tensile strains.Furthermore,the magnetization mechanism related to the magnetostructural evolution under stress-magnetic coupling was discussed.This study provides a new way for smart magnetic microwires for novel non-contact and non-destructive detection.

关 键 词：NI-MN-GA Magnetic shape memory alloy Strain-magnetization effect SUPERELASTICITY Martensitic transformation 

分 类 号：TG146.4[一般工业技术—材料科学与工程]