Achieving strength-ductility synergy in novel heterogeneous lamella structures of Al-Mg-Sc-Zr-Ag alloys

Cheng Guo; Haoshang Liu; Fang Chen; Ran Ma; Bingxin Cong; Haitao Zhang; Jing Zou; Xingang Liu; Hiromi Nagaumi

doi:10.1080/21663831.2025.2464800

Materials Research Letters (Apr 2025)

Achieving strength-ductility synergy in novel heterogeneous lamella structures of Al-Mg-Sc-Zr-Ag alloys

Cheng Guo,
Haoshang Liu,
Fang Chen,
Ran Ma,
Bingxin Cong,
Haitao Zhang,
Jing Zou,
Xingang Liu,
Hiromi Nagaumi

Affiliations

Cheng Guo: School of Mechanical Engineering, Yanshan University, Qinhuangdao, Hebei, People’s Republic of China
Haoshang Liu: School of Mechanical Engineering, Yanshan University, Qinhuangdao, Hebei, People’s Republic of China
Fang Chen: School of Mechanical Engineering, Yanshan University, Qinhuangdao, Hebei, People’s Republic of China
Ran Ma: School of Mechanical Engineering, Yanshan University, Qinhuangdao, Hebei, People’s Republic of China
Bingxin Cong: School of Mechanical Engineering, Yanshan University, Qinhuangdao, Hebei, People’s Republic of China
Haitao Zhang: Key Lab of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, Shenyang, Liaoning, People’s Republic of China
Jing Zou: High-Performance Metal Structural Materials Research Institute, Soochow University, Suzhou, Jiangsu, People’s Republic of China
Xingang Liu: School of Mechanical Engineering, Yanshan University, Qinhuangdao, Hebei, People’s Republic of China
Hiromi Nagaumi: High-Performance Metal Structural Materials Research Institute, Soochow University, Suzhou, Jiangsu, People’s Republic of China

DOI: https://doi.org/10.1080/21663831.2025.2464800
Journal volume & issue: Vol. 13, no. 4
pp. 392 – 400

Abstract

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This paper presents a novel method for preparing heterogeneously structured AlMgScZrAg alloys with excellent properties by microalloying. The addition of Ag modified the precipitation behavior of the alloy, resulting in the combination of multi-scale precipitates and a heterogeneous lamella structure (HLS). Compared with the alloy without Ag, the AlMgScZrAg alloy exhibited a 29.5% increase in yield strength (from 186 MPa to 241 MPa) without sacrificing plasticity. The synergistic strengthening mechanisms of the ‘heterostructure-dislocation-precipitate’ microstructure enhance both the strength and plasticity.

Published in Materials Research Letters

ISSN: 2166-3831 (Online)
Publisher: Taylor & Francis Group
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.tandfonline.com/journals/tmrl

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