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The Effect of Zn Incorporation on the Structure and Mechanical Properties of the Al–Zn Alloy System

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Abstract

A series of Al-xZn alloys (x = 0–30 wt.%) were prepared to investigate the effect of Zn on their structure and mechanical properties. The alloys with Zn content ranging from 0 to 10 wt.% were consisted of single α-Al solid solution phases, but when more than 20 wt.% was added, typical dendritic/interdendritic structure formed and was composed of α-Al phase/Zn-rich (η-rich) phase and α + η eutectoid structure. The grain size of the alloys decreased first and then increased as the Zn incorporation increased. The optimal average size of the refined grain was 122 ± 32 μm in the Al-20 wt.% Zn alloy due to the high drag pressure and low grain boundary growth rate caused by the segregation of Zn atoms and the grain boundary pinning by Zn nanoparticles (η-PP). Moreover, the Al-20Zn alloy demonstrated balanced strength and reasonable ductility and the main strengthening mechanism mainly relied on boundary strengthening by grain refinement.

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Acknowledgements

Financial supports from Basic Research Program of Jiangsu Province (Grants No. BK20181047) and Natural Science Research of Jiangsu Higher Education Institutions of China (Grants No. 18KJB430012) are gratefully acknowledged.

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Authors and Affiliations

  1. School of Materials Science and Engineering, Jiangsu University of Technology, Changzhou, 213001, People’s Republic of China

    Lu Wang, Xia Li & Lin Yang

  2. Laboratory of Advanced Multicomponent Materials, School of Mechanical Engineering, Jiangsu University of Technology, Changzhou, 213001, People’s Republic of China

    Lu Wang, Xia Li, Lin Yang, Mingqin Xu & Jiaojiao Yi

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  1. Lu Wang
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  2. Xia Li
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  3. Lin Yang
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Correspondence to Jiaojiao Yi.

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Wang, L., Li, X., Yang, L. et al. The Effect of Zn Incorporation on the Structure and Mechanical Properties of the Al–Zn Alloy System. Trans Indian Inst Met 75, 79–90 (2022). https://doi.org/10.1007/s12666-021-02402-7

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