Workability optimization and microstructure regulation for a multi-angular extrusion process of AZ80 magnesium alloy

Zexing Su; Chaoyang Sun; Lingyun Qian; Chengzhi Liu; Zhijie Yan; Li Zhang; Rui Wang; Yanlian Liu

Journal of Materials Research and Technology (Nov 2023)

Workability optimization and microstructure regulation for a multi-angular extrusion process of AZ80 magnesium alloy

Zexing Su,
Chaoyang Sun,
Lingyun Qian,
Chengzhi Liu,
Zhijie Yan,
Li Zhang,
Rui Wang,
Yanlian Liu

Affiliations

Zexing Su: School of Mechanical Engineering, North University of China, Taiyuan, 030051, China; Shanxi Key Laboratory of Advanced Metal Materials for Special Environments, North University of China, Taiyuan, 030051, China
Chaoyang Sun: School of Mechanical Engineering, University of Science and Technology Beijing, Beijing, 100083, China; Beijing Key Laboratory of Lightweight Metal Forming, Beijing, 100083, China; Corresponding author. School of Mechanical Engineering, University of Science and Technology Beijing, Beijing, 100083, China.
Lingyun Qian: School of Mechanical Engineering, University of Science and Technology Beijing, Beijing, 100083, China; Beijing Key Laboratory of Lightweight Metal Forming, Beijing, 100083, China
Chengzhi Liu: School of Mechanical Engineering, North University of China, Taiyuan, 030051, China; Shanxi Key Laboratory of Advanced Metal Materials for Special Environments, North University of China, Taiyuan, 030051, China; Corresponding author. School of Mechanical Engineering, North University of China, Taiyuan, 030051, China.
Zhijie Yan: Shanxi Key Laboratory of Advanced Metal Materials for Special Environments, North University of China, Taiyuan, 030051, China; School of Materials Science and Engineering, North University of China, Taiyuan, 030051, China
Li Zhang: School of Mechanical Engineering, North University of China, Taiyuan, 030051, China; Shanxi Key Laboratory of Advanced Metal Materials for Special Environments, North University of China, Taiyuan, 030051, China
Rui Wang: Shanxi Key Laboratory of Advanced Metal Materials for Special Environments, North University of China, Taiyuan, 030051, China; School of Materials Science and Engineering, North University of China, Taiyuan, 030051, China
Yanlian Liu: School of Mechanical Engineering, North University of China, Taiyuan, 030051, China; Shanxi Key Laboratory of Advanced Metal Materials for Special Environments, North University of China, Taiyuan, 030051, China

Journal volume & issue: Vol. 27
pp. 8271 – 8280

Abstract

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Engineering stability control of microstructure evolution and precision forming is a key technical issue for the high-performance manufacturing of magnesium alloy components. In this paper, a fine-grain processing window was proposed for the workability optimization and microstructure control of AZ80 magnesium alloy. The hot activation energy map (AEM) and processing map (PM) were established to analyze the hot-working properties and microstructural mechanisms, respectively. The internal state variable (ISV) based finite element (FE) model was introduced to predict the evolutions of grain size and microstructure homogeneity with processing parameters during multi-angular extrusion process. The fine-grain processing window was used to form a magnesium alloy plate. Fine microstructure and good forming performance were obtained with the optimized processing parameters at the complete DRX domain. Forming at the processing instability domain exhibited flow defects and microstructure heterogeneity. The above research can be applied to the processing parameter optimization and microstructure regulation during hot forming processes of magnesium alloy.

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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