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<p>Compared with costly wear-resistant alloys such as bronze and zinc-based alloys, high-zinc aluminium alloys present a promising alternative. Usually, strength and ductility in metals are inversely related, posing the same bottleneck in high-zinc aluminium alloys. Here, we improve the strength and ductility of high-zinc aluminium alloy. Through microalloying, 0.8 wt% Ag and 0.25 wt% Sc were introduced into high-zinc aluminium alloys, resulting in multi-dimensional modification of the brittle <i>η</i>-Zn phases. Ag dissolves in the <i>η</i>-Zn phase, modifying its morphology from a rough ellipse to a fine strip. Sc forms Al<sub>3</sub>Sc precipitates, which act as nucleation sites for more and finer <i>η</i>-Zn particles. The distribution of <i>η</i>-Zn is regulated in multiple dimensions. Finally, an alloy with a yield strength of 400 MPa and an elongation of 13.8% was obtained, representing increases of 45.5% and 126%, respectively, compared to the base high-zinc aluminium alloy.</p>

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Designing wear-resistant high-zinc aluminium alloys with high strength and ductility

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年4月2日

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  • Haitao Zhang,
  • Donghui Yang,
  • Xiaoyu Song,
  • Zibin Wu,
  • Cheng Guo,
  • Ke Qin,
  • Dongtao Wang,
  • Ping Wang,
  • Hiromi Nagaumi

摘要

Compared with costly wear-resistant alloys such as bronze and zinc-based alloys, high-zinc aluminium alloys present a promising alternative. Usually, strength and ductility in metals are inversely related, posing the same bottleneck in high-zinc aluminium alloys. Here, we improve the strength and ductility of high-zinc aluminium alloy. Through microalloying, 0.8 wt% Ag and 0.25 wt% Sc were introduced into high-zinc aluminium alloys, resulting in multi-dimensional modification of the brittle η-Zn phases. Ag dissolves in the η-Zn phase, modifying its morphology from a rough ellipse to a fine strip. Sc forms Al3Sc precipitates, which act as nucleation sites for more and finer η-Zn particles. The distribution of η-Zn is regulated in multiple dimensions. Finally, an alloy with a yield strength of 400 MPa and an elongation of 13.8% was obtained, representing increases of 45.5% and 126%, respectively, compared to the base high-zinc aluminium alloy.