Enhanced Reversible Magnetic-Field-Induced Strain in Ni-Mn-Ga Alloy

被引：2

作者：

Wu, Pingping ^{[1
,2
]}

Liang, Yongfeng ^{[3
]}

机构：

[1] Xiamen Inst Technol, Dept Mat Sci & Engn, Xiamen 361021, Peoples R China

[2] Xiamen Inst Technol, Higher Educ Key Lab Flexible Mfg Equipment Integr, Xiamen 361021, Peoples R China

[3] Univ Sci & Technol Beijing, State Key Lab Adv Met & Mat, Beijing 100083, Peoples R China

来源：

METALS | 2021年 / 11卷 / 12期

关键词：

phase-field model; magnetic-field-induced strain; Ni-Mn-Ga alloys; ferromagnetic shape-memory alloy; TEMPERATURE-DEPENDENCE; DOMAIN-STRUCTURES; MEMORY; SUPERELASTICITY; REORIENTATION; MODEL;

D O I：

10.3390/met11122017

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A phase-field model was developed to simulate the ferromagnetic domain structure and martensite variant microstructure of Ni-Mn-Ga shape-memory alloy. The evolution of reversible magnetic-field-induced strain (MFIS) and associated magnetic domain/martensite variant structure were modeled under an external magnetic field. It was found that MFIS increased significantly from 0.2% to 0.28% as the temperature increased from 265 K to 285 K. In addition, compressive pre-stress efficiently enhanced the MFIS of the alloy, while tensile stress reduced MFIS. Furthermore, it was proved that there was possibility of achieving similar enhancement of MFIS by replacing compressive stress with perpendicular biaxial tensile stress. The results revealed that the residual variant induced by stress plays an important role in the reversible MFIS effect.

引用

页数：10

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