Microstructure and corrosion behaviors of AZ63 magnesium alloy fabricated by accumulative roll bonding process

Yanbo Pei; Yunwei Gui; Tao Huang; Fuxiao Chen; Junqing Guo; Shiyu Zhong; Zhuo Song

doi:10.1088/2053-1591/ab9c61

Materials Research Express (Jan 2020)

Microstructure and corrosion behaviors of AZ63 magnesium alloy fabricated by accumulative roll bonding process

Yanbo Pei,
Yunwei Gui,
Tao Huang,
Fuxiao Chen,
Junqing Guo,
Shiyu Zhong,
Zhuo Song

Affiliations

Yanbo Pei: School of Materials Science and Engineering, Henan University of Science and Technology , Luoyang 471023, People’s Republic of China; Collaborative Innovation Center of Nonferrous Metals, Luoyang 471023, People’s Republic of China; Key Laboratory of Materials Science &Processing Technology for Non-Ferrous Metals of Henan, Luoyang 471023, People’s Republic of China
Yunwei Gui: School of Materials Science and Engineering, Henan University of Science and Technology , Luoyang 471023, People’s Republic of China; Collaborative Innovation Center of Nonferrous Metals, Luoyang 471023, People’s Republic of China; Key Laboratory of Materials Science &Processing Technology for Non-Ferrous Metals of Henan, Luoyang 471023, People’s Republic of China
Tao Huang: ORCiD; School of Materials Science and Engineering, Henan University of Science and Technology , Luoyang 471023, People’s Republic of China; Collaborative Innovation Center of Nonferrous Metals, Luoyang 471023, People’s Republic of China; Key Laboratory of Materials Science &Processing Technology for Non-Ferrous Metals of Henan, Luoyang 471023, People’s Republic of China
Fuxiao Chen: School of Materials Science and Engineering, Henan University of Science and Technology , Luoyang 471023, People’s Republic of China; Collaborative Innovation Center of Nonferrous Metals, Luoyang 471023, People’s Republic of China; Key Laboratory of Materials Science &Processing Technology for Non-Ferrous Metals of Henan, Luoyang 471023, People’s Republic of China
Junqing Guo: School of Materials Science and Engineering, Henan University of Science and Technology , Luoyang 471023, People’s Republic of China; Collaborative Innovation Center of Nonferrous Metals, Luoyang 471023, People’s Republic of China; Key Laboratory of Materials Science &Processing Technology for Non-Ferrous Metals of Henan, Luoyang 471023, People’s Republic of China
Shiyu Zhong: Chengdu Galaxy Power Co. Ltd, Chengdu 610000, People’s Republic of China
Zhuo Song: School of Materials Science and Engineering, Henan University of Science and Technology , Luoyang 471023, People’s Republic of China; Collaborative Innovation Center of Nonferrous Metals, Luoyang 471023, People’s Republic of China; Key Laboratory of Materials Science &Processing Technology for Non-Ferrous Metals of Henan, Luoyang 471023, People’s Republic of China

DOI: https://doi.org/10.1088/2053-1591/ab9c61
Journal volume & issue: Vol. 7, no. 6
p. 066525

Abstract

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AZ63 magnesium alloy sheets were fabricated by accumulative roll bonding (ARB) process at 350 °C up to 5 cycles. The aim of this work is to study the effect of ARB process on the microstructure and corrosion behavior of AZ63 magnesium alloy. The ARBed sheets were investigated via microstructure observations, electrochemical tests, hydrogen evolution measurements and immersion tests. After ARB process, the average grain size decreased. The coarse Mg _17 Al _12 phase was broken under the action of rolling force and it distributed more dispersed in the magnesium matrix. The corrosion resistance of samples increased significantly with increasing the number of ARB cycles. The influence of microstructure on the corrosion behaviors was discussed. Fine grain produced more passive oxide layers which acted as a corrosion barrier. The Mg _17 Al _12 phase acted primarily as a micro-galvanic cathode during the corrosion process because of its low volume fraction and isolated distribution. The volume fraction of Mg _17 Al _12 phase decreased after ARB process, which results in the reduction of the effect of galvanic corrosion.

Published in Materials Research Express

ISSN: 2053-1591 (Online)
Publisher: IOP Publishing
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials; Technology: Chemical technology
Website: https://iopscience.iop.org/journal/2053-1591

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