Microstructure evolution and corrosion resistance of high-pressure rheo-cast Mg–Zn–Y alloy containing quasicrystal

Xiaogang Fang; Dechao Wu; Jiguang Liu; Youwen Yang; Shulin Lv; Shusen Wu; Yiqing Chen

Journal of Materials Research and Technology (May 2023)

Microstructure evolution and corrosion resistance of high-pressure rheo-cast Mg–Zn–Y alloy containing quasicrystal

Xiaogang Fang,
Dechao Wu,
Jiguang Liu,
Youwen Yang,
Shulin Lv,
Shusen Wu,
Yiqing Chen

Affiliations

Xiaogang Fang: School of Materials Science and Engineering, Hefei University of Technology, Hefei, 230009, China; Engineering Research Center of Ministry of Education for High Performance Copper Alloy Materials and Forming, Hefei, 230009, China; State Key Laboratory of Material Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan, 430074, China; Corresponding author.
Dechao Wu: School of Materials Science and Engineering, Hefei University of Technology, Hefei, 230009, China; Engineering Research Center of Ministry of Education for High Performance Copper Alloy Materials and Forming, Hefei, 230009, China
Jiguang Liu: School of Materials Science and Engineering, Hefei University of Technology, Hefei, 230009, China; Engineering Research Center of Ministry of Education for High Performance Copper Alloy Materials and Forming, Hefei, 230009, China
Youwen Yang: School of Materials Science and Engineering, Hefei University of Technology, Hefei, 230009, China; Engineering Research Center of Ministry of Education for High Performance Copper Alloy Materials and Forming, Hefei, 230009, China
Shulin Lv: State Key Laboratory of Material Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan, 430074, China
Shusen Wu: State Key Laboratory of Material Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan, 430074, China
Yiqing Chen: School of Materials Science and Engineering, Hefei University of Technology, Hefei, 230009, China; Engineering Research Center of Ministry of Education for High Performance Copper Alloy Materials and Forming, Hefei, 230009, China; Corresponding author.

Journal volume & issue: Vol. 24
pp. 542 – 556

Abstract

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The effects of high pressure applied during rheo-squeeze casting (RSC) process on the microstructure evolution and corrosion resistance of Mg90.8Zn8.6Y0.6 alloy were investigated. The results reveal that with the increase of pressure, both the average size of α-Mg grains and the lamellar spacing of in-situ formed quasicrystal phase (I–Mg3Zn6Y) are continuously decreased. Meanwhile, the high-pressure results in the increase in the supersaturation of Zn in matrix, the decrease in volume fraction of second phases and the disappearance of Mg7Zn3 phase. The high-pressure contributed to the improvement of corrosion resistance, and the corrosion process was changed from three stages (galvanic corrosion, filiform corrosion and pitting corrosion) to two stages (galvanic corrosion and pitting corrosion), which was mainly attributed to the supersaturation of Zn in matrix, the continuous distribution of finer I-phase and the disappearance of Mg7Zn3.

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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