Effect of homogenization treatment on microstructure and phase evolution behavior of 6061 aluminum alloy

doi:10.13251/j.issn.0254-6051.2023.05.030

Abstract

Abstract: Microstructure of 6061 aluminum alloy sheet as-cast and after homogenization treatment was studied by means of OM, SEM and DSC. The transformation process of precipitated phase particles and the evolution law of composition uniformity in the alloy before and after homogenization were analyzed. The results show that after homogenization at 579 ℃ for 6 h, the low melting point non-equilibrium eutectic phase of the alloy is fully dissolved, the segregation of intracrystalline composition is basically eliminated, and the content of the retained second phase in the alloy is as low as 0.87%. Meanwhile, the acicular iron-rich phase is spheroidized and distributed discontinuously, the homogenization effect of the alloy is excellent, which can provide a reference for the formulation of reasonable heat treatment process in large-scale production.

Key words: 6061 aluminum alloy, homogenization, heat treatment, microstructure, precipitated phase particle

CLC Number:

TG146.2

Cheng Zhiyuan, Wang Jingtao, Guo Fengjia, Sun Ning, Yu Jihai. Effect of homogenization treatment on microstructure and phase evolution behavior of 6061 aluminum alloy[J]. Heat Treatment of Metals, 2023, 48(5): 196-203.

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