Exploring the Function Fatigue Behavior of Ferromagnetic Shape Memory Alloy

6th Annual International Conference on Material Science and Environmental Engineering

材料科学;生态环境科学

Ju, Jia^1^2^3 ; Kang, Yan^1 ; Shuai, Liguo^2 ; Yan, Chen^4

Jiangsu Key Laboratory of Advanced Structural Materials and Application Technology, School of Materials Engineering, Nanjing Institute of Technology, Jiangsu

211167, China^1

School of Mechanical Engineering, Southeast University, Nanjing

211189, China^2

Hangzhou Kaierda Electric Welder CO. LTD, Hangzhou

310000, China^3

Zhongtian Alloy Technology CO. LTD, Nantong

226010, China^4

关键词: Applied magnetic fields;    Elastic deformation stage;    Fatigue behavior;    Ferromagnetic shape memory alloy;    Ferromagnetic shape memory effect;    Long cycles;    Magnetic field-induced strain;    Ni2MnGa;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/472/1/012007/pdf
DOI  :  10.1088/1757-899X/472/1/012007

来源: IOP

【 摘 要 】

In the industrial applications of ferromagnetic shape memory alloy, the large magnetic field induced strain and long function fatigue life are the essential conditions for their application. In this cases, the ferromagnetic shape memory effect and the function fatigue of Ni2MnGa under applied magnetic field has been investigated. The magnetic field induced strain appear typical nonlinearity increasing trend apparently with the applied magnetic field rising. Meanwhile, the magnetic field induced strain keep decreasing tendency as the applied magnetic field cycles increasing and the magnetic field induced strain kept a small value in a long cycle ranges of 400 to 107. Furthermore, the sample appeared typical elastic deformation stage, twin martensite remigration stage and plastic deformation stage during compression test process.