Official PDF Translation•China Foundry

Effect of heat treatment on microstructure and mechanical properties of a novel Al-Zn-Mg-Cu alloy

Authors: Yan-mei Yang; Xin-chen Tang; Ye-fei Li; Xue-wei Fang; Da-wei Yi; Zhi-yun Zhang; Qiao-ling Zheng; Zhi-xi Wang; Guo-yu Zhang; Su Zhang; Hao Cheng; Yang He; Yi-bo Liu; Zi-han Wu; Ya-nan Chen; Yi-min Gao

DOI: 10.1007/s41230-025-4017-1Status: Verified Translated Edition

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Key Findings in This Report

• Optimal single-stage aging at 120°C for 24h yields UTS of 523 MPa, YS of 482 MPa, and elongation of 1.75%. • Double-stage aging (120°C/24h + 150°C/52h) significantly improves ductility to 4.17% elongation but reduces strength. • Increasing solution time dissolves strengthening phases, reducing hardness and coarsening grains. • TEM reveals that longer second-stage aging enlarges grain size, precipitate spacing, and precipitate-free zone width.