Realizing the interaction mechanism of the solute grain boundary segregation and precipitation behavior of Mg-Zn-Gd-Sm alloy

Yang Zhou; Hansong Xue; Shanyi Lan; Jinyu Zhang; Jia She; Dingfei Zhang; Jia Hu; Fusheng Pan

doi:10.1080/21663831.2024.2438872

Materials Research Letters (Dec 2024)

Realizing the interaction mechanism of the solute grain boundary segregation and precipitation behavior of Mg-Zn-Gd-Sm alloy

Yang Zhou,
Hansong Xue,
Shanyi Lan,
Jinyu Zhang,
Jia She,
Dingfei Zhang,
Jia Hu,
Fusheng Pan

Affiliations

Yang Zhou: College of Materials Science and Engineering, Chongqing University, Chongqing, People’s Republic of China
Hansong Xue: College of Materials Science and Engineering, Chongqing University, Chongqing, People’s Republic of China
Shanyi Lan: College of Materials Science and Engineering, Chongqing University, Chongqing, People’s Republic of China
Jinyu Zhang: College of Materials Science and Engineering, Chongqing University, Chongqing, People’s Republic of China
Jia She: College of Materials Science and Engineering, Chongqing University, Chongqing, People’s Republic of China
Dingfei Zhang: College of Materials Science and Engineering, Chongqing University, Chongqing, People’s Republic of China
Jia Hu: College of Materials Science and Engineering, Chongqing University, Chongqing, People’s Republic of China
Fusheng Pan: College of Materials Science and Engineering, Chongqing University, Chongqing, People’s Republic of China

DOI: https://doi.org/10.1080/21663831.2024.2438872

Abstract

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A novel Mg-6.2Gd-4.2Sm-1.2Zn alloy with a superior strength-ductility combination was achieved by traditional extrusion process and aging. Based on the characteristics of substitutional solution among rare earth (RE) elements, the Sm substitute part Gd element change the morphology of the LPSO phase, and the volume fraction of the 14H-LPSO phase increases, leading to a finer size and more dispersed distribution. Meanwhile, the Sm addition reduces the level of GB segregation of Zn and Gd, which further affects the precipitation of nano-precipitates during aging. The results offer insight into determining the precipitation behavior of second phases via regulating solute GB segregation.

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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