Effect of solution treatment on microstructure and properties of Al-Zn-Cu-Mg-Zr-Ce alloy

doi:10.13251/j.issn.0254-6051.2023.06.022

Abstract

Abstract: Effect of solution treatment on microstructure and properties of Al-7.5Zn-1.5Cu-1.5Mg-0.12Zr-0.1Ce aluminum alloy was studied by means of metallographic microscope, scanning electron microscope and tensile testing machine. The results show that under the solution treatment process with temperature range of 460-480 ℃ and holding time of 30-120 min, after single stage solution treatment at 470 ℃ for 2 h, recrystallization occurs and most of the second phase dissolves into the matrix. Compared with other single stage solution treatment, the solution effect is the best, and the comprehensive mechanical properties is good after aging treatment. After 450 ℃×1 h+475 ℃×1 h two-stage solution treatment, due to the release of deformation energy at low temperature and low recrystallization degree, the solution effect is better than that of the single stage solution treatment, and the comprehensive mechanical properties of the alloy is better after aging treatment.

Key words: Al-Zn-Cu-Mg-Zr-Ce aluminum alloy, solution treatment, mechanical properties, microstructure

CLC Number:

TG146.21

Guo Fengjia, Ma Fang, Xiao Fulai, Chi Rui, Wang Jingtao, Sun Ning. Effect of solution treatment on microstructure and properties of Al-Zn-Cu-Mg-Zr-Ce alloy[J]. Heat Treatment of Metals, 2023, 48(6): 121-125.

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