Improvement in the age-hardening response of Mg–7Sn alloy by compressive stress-assisted aging

Jing Jiang; Lin Tong; Zuocheng Xu; Guangli Bi; Chi Cao; Yuandong Li; Tijun Chen; Wei Fu; Daqing Fang

Journal of Materials Research and Technology (Mar 2023)

Improvement in the age-hardening response of Mg–7Sn alloy by compressive stress-assisted aging

Jing Jiang,
Lin Tong,
Zuocheng Xu,
Guangli Bi,
Chi Cao,
Yuandong Li,
Tijun Chen,
Wei Fu,
Daqing Fang

Affiliations

Jing Jiang: State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou 730050, PR China; School of Material Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, PR China
Lin Tong: State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou 730050, PR China; School of Material Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, PR China
Zuocheng Xu: Erzhong (Deyang) Heavy Equipment Co., Ltd, Deyang 618000, PR China
Guangli Bi: State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou 730050, PR China; School of Material Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, PR China; Corresponding author.
Chi Cao: State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou 730050, PR China; School of Material Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, PR China
Yuandong Li: State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou 730050, PR China; School of Material Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, PR China
Tijun Chen: State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou 730050, PR China; School of Material Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, PR China
Wei Fu: State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, 710049, PR China; Corresponding author.
Daqing Fang: State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, 710049, PR China

Journal volume & issue: Vol. 23
pp. 2601 – 2611

Abstract

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Stress aging is an effective method to improve age-hardening behavior of Mg alloys. In this paper, the stress aging was applied to improve poor age-hardening response of Mg–7Sn alloy. The age-hardening behavior, microstructure evolution and mechanical properties of Mg–7Sn alloy with an external compressive stress were investigated. The stress aging significantly altered the size, morphology, amounts and distribution of Mg2Sn phase. During the stress aging, micro/nano scale Mg2Sn particles precipitated on the basal plane of the stress aged alloy and their volume fraction remarkably increased as compared with the isothermal aging alloy. Interestingly, small amounts of Mg2Sn phases precipitated on the non-basal planes. The stress aging significantly reduced the peak aging time (96 h) and increased peak aging hardness (68.4 HV). The tensile tests showed that the stress peak-aged alloy at 80 MPa exhibited the highest tensile strengths (σ0.2 = 140 MPa and σb = 217 MPa), which were mainly attributed to the precipitation strengthening of Mg2Sn phase.

Published in Journal of Materials Research and Technology

ISSN: 2238-7854 (Print); 2214-0697 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Mining engineering. Metallurgy
Website: https://www.journals.elsevier.com/journal-of-materials-research-and-technology/

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