Synergistic effect of gradient Zn content and multiscale particles on the mechanical properties of Al–Zn–Mg–Cu alloys with coupling distribution of coarse–fine grains

Liangliang Yuan; Mingxing Guo; Yi Wang; Yun Wang; Linzhong Zhuang

doi:10.1007/s12613-024-2871-2

Volume 31 Issue 6

Jun. 2024

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2024 > 31(6): 1392-1405

Liangliang Yuan, Mingxing Guo, Yi Wang, Yun Wang, and Linzhong Zhuang, Synergistic effect of gradient Zn content and multiscale particles on the mechanical properties of Al–Zn–Mg–Cu alloys with coupling distribution of coarse–fine grains, Int. J. Miner. Metall. Mater., 31(2024), No. 6, pp. 1392-1405. https://doi.org/10.1007/s12613-024-2871-2

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Liangliang Yuan, Mingxing Guo, Yi Wang, Yun Wang, and Linzhong Zhuang, Synergistic effect of gradient Zn content and multiscale particles on the mechanical properties of Al–Zn–Mg–Cu alloys with coupling distribution of coarse–fine grains, Int. J. Miner. Metall. Mater., 31(2024), No. 6, pp. 1392-1405. https://doi.org/10.1007/s12613-024-2871-2

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Research Article

Synergistic effect of gradient Zn content and multiscale particles on the mechanical properties of Al–Zn–Mg–Cu alloys with coupling distribution of coarse–fine grains

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Corresponding authors:
Liangliang Yuan    E-mail: liangliang_yuan@163.com

Mingxing Guo    E-mail: mingxingguo@skl.ustb.edu.cn

Linzhong Zhuang    E-mail: linzhongzhuang@163.com
Received: 1 August 2023; Revised: 28 February 2024; Accepted: 29 February 2024; Available online: 1 March 2024

Abstract

Abstract

This study investigated the influence of graded Zn content on the evolution of precipitated and iron-rich phases and grain structure of the alloys, designed and developed the Al–8.0Zn–1.5Mg–1.5Cu–0.2Fe (wt%) alloy with high strength and formability. With the increase of Zn content, forming the coupling distribution of multiscale precipitates and iron-rich phases with a reasonable matching ratio and dispersion distribution characteristics is easy. This phenomenon induces the formation of cell-like structures with alternate distribution of coarse and fine grains, and the average plasticity–strain ratio (characterizing the formability) of the pre-aged alloy with a high strength is up to 0.708. Results reveal the evolution and influence mechanisms of multiscale second-phase particles and the corresponding high formability mechanism of the alloys. The developed coupling control process exhibits considerable potential, revealing remarkable improvements in the room temperature formability of high-strength Al–Zn–Mg–Cu alloys.
- Al–Zn–Mg–Cu alloy;
- iron-rich phase;
- high formability;
- microstructure;
- mechanisms

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