Effect of minor Gd addition on microstructure, mechanical performance, and corrosion behavior of Mg–Y–Gd alloys

Wenjun Ci; Lili Deng; Xianhua Chen; Xu Dai; Li Feng; Chen Wen; Jingying Bai; Fusheng Pan

Journal of Materials Research and Technology (Sep 2023)

Effect of minor Gd addition on microstructure, mechanical performance, and corrosion behavior of Mg–Y–Gd alloys

Wenjun Ci,
Lili Deng,
Xianhua Chen,
Xu Dai,
Li Feng,
Chen Wen,
Jingying Bai,
Fusheng Pan

Affiliations

Wenjun Ci: College of Materials Science and Engineering, Chongqing University, Chongqing 400045, China; National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing 400045, China
Lili Deng: College of Materials Science and Engineering, Chongqing University, Chongqing 400045, China; National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing 400045, China
Xianhua Chen: College of Materials Science and Engineering, Chongqing University, Chongqing 400045, China; National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing 400045, China; Corresponding author. College of Materials Science and Engineering, Chongqing University, Chongqing 400045, China.
Xu Dai: State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing 400044, China
Li Feng: Beijing Spacecrafts, China Academy of Space Technology, Beijing 100194, China
Chen Wen: Beijing Spacecrafts, China Academy of Space Technology, Beijing 100194, China
Jingying Bai: Beijing Spacecrafts, China Academy of Space Technology, Beijing 100194, China
Fusheng Pan: College of Materials Science and Engineering, Chongqing University, Chongqing 400045, China; National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing 400045, China

Journal volume & issue: Vol. 26
pp. 4107 – 4120

Abstract

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Effects of minor Gd addition on the micro-structure, mechanical performance, and corrosion behavior of Mg-1Y alloys were systematically studied. With the addition of increased Gd content, the hydrogen evolution rate of Mg-Y-Gd alloys decreased from 2.0 to 0.5 mm/y. Moreover, the alloying Gd in Mg-Y-Gd alloys leaded to the transformation of the active Mg24Y5 phase into the Mg5(GdY) phase. The high corrosion resistance of Mg-1Y-0.6Gd alloy can be attributed to the fine grain size, uniform distribution of surface potential, and the formation of protective corrosion passivation film rich in Gd2O3 and Y2O3.

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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