Unveiling synergistic strength and plasticity enhancement of Mg–Zn–Mn alloy via closed forging extrusion

Xuerui Jing; Shibo Zhou; Sihui Ouyang; Jia She; Peng Peng; Aitao Tang; Fusheng Pan

Journal of Materials Research and Technology (Jul 2024)

Unveiling synergistic strength and plasticity enhancement of Mg–Zn–Mn alloy via closed forging extrusion

Xuerui Jing,
Shibo Zhou,
Sihui Ouyang,
Jia She,
Peng Peng,
Aitao Tang,
Fusheng Pan

Affiliations

Xuerui Jing: College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China
Shibo Zhou: College of Materials Science and Engineering, Chongqing University of Technology, Chongqing, 400054, China
Sihui Ouyang: College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China; National Engineering Research Center for Mg Alloys, Chongqing University, Chongqing, China; Corresponding author. College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China.
Jia She: College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China; National Engineering Research Center for Mg Alloys, Chongqing University, Chongqing, China; Lanxi Magnesium Materials Research Institute, Lanxi, 321100, China; Corresponding author. College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China.
Peng Peng: School of Metallurgy and Materials Engineering, Chongqing University of Science and Technology, Chongqing, 401331, China
Aitao Tang: College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China; National Engineering Research Center for Mg Alloys, Chongqing University, Chongqing, China; Corresponding author. College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China.
Fusheng Pan: College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China; National Engineering Research Center for Mg Alloys, Chongqing University, Chongqing, China

Journal volume & issue: Vol. 31
pp. 3466 – 3479

Abstract

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A cost-effective, high-performance Mg-2.0Zn-1.5Mn alloy was fabricated using closed forging extrusion (CFE). The results reveal that CFE can promote a dynamic recrystallization (DRX) ratio and enhance the residual dislocation density in deformed grains and subgrains. Grain refinement is achieved through multiple DRX mechanisms, particle-stimulated nucleation, and pinning effects. In addition, the basal texture and precipitation behavior are significantly influenced by pre-forging in CFE. Finally, grain refinement and substantial residual dislocations result in a good combination of strength and plasticity, with the ultimate tensile strength of 400 MPa and elongation of 22.1%, respectively. A novel strategy for regulating the bimodal grain structure is proposed to guide the optimization of the mechanical performance of rare-earth free Mg alloys.

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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