Effects of solution and aging treatment on mechanical properties and microstructure evolution of as-extruded 6082 aluminum alloy

doi:10.13251/j.issn.0254-6051.2021.06.017

Abstract

Abstract: Effects of solution and aging treatment on mechanical properties and microstructure of as-extruded 6082 aluminum alloy were studied by using tensile testing machine, optical microscope and transmission electron microscope. The results show that the strength of the specimens solution treated at 530 ℃ is higher than that of specimens solution treated at 550 ℃, and the alloy shows different mechanical properties anisotropy after solution treatment at different temperatures, the yield strength of the alloy is significantly improved after aging treatment. The grain size of the alloy solution treated at 550 ℃ is obviously coarser. A large number of needle precipitates in the alloy are distributed after aging treatment, which can effectively hinder the movement of dislocation and enhance the strength of the alloy. A large number of dimples are found in the tensile fracture of the as-extruded alloy after different solution and aging treatments, showing the characteristics of ductile fracture.

Key words: solution and aging treatment, 6082 aluminum alloy, mechanical properties, microstructure, anisotropy

CLC Number:

TG146.2

Liu Jizhao, Liu Wei, Yuan Haodeng, Wu Yuanzhi, Ye Tuo, Liu Wei, Deng Bin. Effects of solution and aging treatment on mechanical properties and microstructure evolution of as-extruded 6082 aluminum alloy[J]. Heat Treatment of Metals, 2021, 46(6): 82-87.

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