文章信息/Info

Title:

Modulus Softening and Martensitic Transformation in Large Magnetostrictive Fe-Ga Alloys

文章編號:

1674-3962(2020)09-0661-09

作者:

喬睿華; 劉孝蓮; 茍峻銘; 馬天宇

（西安交通大學 前沿科學技術研究院，陜西 西安 710054）

Author(s):

QIAO Ruihua;  LIU Xiaolian;  GOU Junming;  MA Tianyu

(Frontier Institute of Science and Technology, Xi�餫n Jiao Tong University, Xi�餫n 710054, China)

關鍵詞:

磁致伸縮材料; Fe�睪a合金; 模量軟化; 馬氏體相變

Keywords:

magnetostrictive materials;  Fe-Ga alloys;  modulus softening;  martensitic transformation

分類號:

M271

DOI:

10.7502/j.issn.1674-3962.201912011

文獻標志碼:

A

摘要:

Fe-Ga合金因其低場大磁致伸縮性能和良好的力學性能，在傳感器、換能器和精密加工等高技術領域具有重要應用前景，自2000年以來成為磁致伸縮材料研究的熱點。盡管目前人們對非磁性Ga元素固溶于α-Fe顯著提升磁致伸縮性能的微結構根源沒有形成統一認識，但大量的研究表明Fe�睪a合金的大磁致伸縮與模量軟化行為密切相關。鑒于模量軟化是馬氏體相變的重要特征，有學者推測Fe-Ga合金可能也蘊含馬氏體相變現象。主要概述了Fe100-xGax(x=21~27，原子百分數)合金的模量軟化現象、馬氏體相變行為、馬氏體相變與磁致伸縮性能的關聯性等研究進展，以加深對Fe-Ga合金大磁致伸縮微結構根源的理解。

Abstract:

Fe-Ga alloys have important application prospects in high-tech fields， such as sensors, transducers and actuators due to their large magnetostriction under low saturation magnetic field and good mechanical properties. Although the microstructure mechanisms are still controversial for the extraordinary magnetostriction enhancement induced by nonmagnetic Ga solution into body-centered�瞔ubic Fe, considerable experiments have indicated that the large magnetostriction of Fe-Ga alloys is closely related to the modulus softening behavior. Considering that modulus softening is a common feature of martensitic transformation in ferroelastics, researchers then suggested that Fe-Ga alloys may also have martensitic transformation phenomena. In order to deepen the understanding of large magnetostriction in Fe-Ga alloys, here we present a brief review on the modulus softening, martensitic transformation behavior as well as the correlation between martensitic transformation and magnetostriction of Fe-Ga alloys with Ga content between 21at.% and 27at.%.