The effect of Al addition on the microstructure, magnetostrictive and mechanical properties of Fe73Ga27 alloy

• Published in: Materials today communications Vol. 37; p. 107415
• Main Authors: Du, Jinchao, Li, Xiao, Zhang, Zhiguang, Jiao, Peiying, Liang, Zhicheng, Gong, Pei
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.12.2023
• Subjects: Al addition; Magnetostrictive properties; Mechanical properties; Microstructure; Mechanical properties; Microstructure; Magnetostrictive properties; Al addition
• ISSN: 2352-4928; 2352-4928
• DOI: 10.1016/j.mtcomm.2023.107415

Fe-Ga alloy exhibits two magnetostrictive peaks when the Ga content (at%) is 19 and 27, respectively but most studies have focused on improving the performance of Fe81Ga19. In order to reduce the manufacturing cost of the alloys and achieve better mechanical properties, Al element is used to replace part of the Ga of Fe73Ga27 alloy in this experiment. So long as the magnetostrictive properties does not decrease significantly, which is in line with expectations from an engineering application perspective. Fe73Ga27−xAlx (x = 0,1,2,3,4,5) alloys were prepared by vacuum arc furnace and the effect of Al addition on the microstructure, magnetostrictive properties, and mechanical properties of the alloys is studied. The results show that the phase structure of alloys is chiefly composed of A2 phase and the metallographic structure of the alloys is comprised of equiaxed and columnar grains. The fracture morphology of the alloys is principally intergranular brittle fracture and cleavage fracture, and the reasons for the alloys fracture include the detachment of Fe and Al elements and the segregation of Fe, Ga, Al elements. Except for Fe73Ga27 alloy, the tensile strength, elongation, and Vickers hardness of the alloys are ameliorated when the content of Al added is equal to 4 at% while the parallel magnetostrictive strain(λ∥) of the alloy crested 81 ppm, which is 24.3% higher than Fe73Ga27. [Display omitted]