Effect of solution and aging treatment on microstructure and properties of AlMg5Si2Mn aluminum alloy

doi:10.13251/j.issn.0254-6051.2024.01.023

Abstract

Abstract: Effects of solution and aging treatment on microstructure and properties of the AlMg5Si2Mn aluminum alloy were studied by means of hardness testing, microstructure observation, XRD, tensile testing and cross-section fracture observation. The results show that after solution and aging treatment, the morphology of Mg₂Si in the alloy changes from labyrinth and rod to fine spherical shape and distributes more uniform, and thardness of the alloy is significantly improved, which increases first and then decreases as the solution treatment temperature increases, meanwhile, the tensile properties are also significantly improved. After solution treatment at 530 ℃ for 30 min and aging at 190 ℃ for 6 h, the hardness of the AlMg5Si2Mn aluminum alloy is high and up to 49.5 HRB, the tensile strength, yield strength and elongation after fracture is 260 MPa, 173 MPa, 17%, respectively.

Key words: AlMg5Si2Mn aluminum alloy, Mg₂Si, solution and aging treatment, mechanical properties

CLC Number:

Di Yifei, Li Jia, Li Yong, Zhao Rongda, Xiang Jun, Wu Fufa. Effect of solution and aging treatment on microstructure and properties of AlMg5Si2Mn aluminum alloy[J]. Heat Treatment of Metals, 2024, 49(1): 148-153.

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