Effect of Sn content on the mechanical properties and corrosion behavior of Mg-3Al-xSn alloys

Zhaochen Yu; Qianfei Huang; Wentao Zhang; Chao Luo; Hongyu Guan; Yang Chen; Honggun Song; Zhi Hu; Chassagne Luc

doi:10.1088/2053-1591/aba149

Materials Research Express (Jan 2020)

Effect of Sn content on the mechanical properties and corrosion behavior of Mg-3Al-xSn alloys

Zhaochen Yu,
Qianfei Huang,
Wentao Zhang,
Chao Luo,
Hongyu Guan,
Yang Chen,
Honggun Song,
Zhi Hu,
Chassagne Luc

Affiliations

Zhaochen Yu: Department of mechanical and Electrical Engineering, Nanchang University , Nanchang, 330031, People’s Republic of China; Laboratoire d’Ingénierie des Systèmes de Versailles, Université de Versailles Saint-Quentin, University of Paris-Saclay , 78140 Versailles, France
Qianfei Huang: School of Information Engineering, Jiangxi Modern Polytechnic College, Jiangxi 330095, People’s Republic of China
Wentao Zhang: School of Information Engineering, Jiangxi Modern Polytechnic College, Jiangxi 330095, People’s Republic of China
Chao Luo: ORCiD; Department of mechanical and Electrical Engineering, Nanchang University , Nanchang, 330031, People’s Republic of China; Institute for Advanced Study, Nanchang University , Nanchang, 330031, People’s Republic of China
Hongyu Guan: Laboratoire d’Ingénierie des Systèmes de Versailles, Université de Versailles Saint-Quentin, University of Paris-Saclay , 78140 Versailles, France
Yang Chen: Department of mechanical and Electrical Engineering, Nanchang University , Nanchang, 330031, People’s Republic of China
Honggun Song: ORCiD; Department of mechanical and Electrical Engineering, Nanchang University , Nanchang, 330031, People’s Republic of China
Zhi Hu: Department of mechanical and Electrical Engineering, Nanchang University , Nanchang, 330031, People’s Republic of China
Chassagne Luc: Laboratoire d’Ingénierie des Systèmes de Versailles, Université de Versailles Saint-Quentin, University of Paris-Saclay , 78140 Versailles, France

DOI: https://doi.org/10.1088/2053-1591/aba149
Journal volume & issue: Vol. 7, no. 7
p. 076505

Abstract

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The effect of Sn content on the mechanical properties and corrosion behavior of Mg-3Al-xSn alloys was investigated by SEM-EDXS, XRD, electrochemical measurements, and scanning Kelvin probe force microscopy (SKPFM). The results showed that when the Sn content was 1.4 wt%, Sn dissolved in the α -Mg matrix and then precipitated as an intermetallic compound (Mg _2 Sn). The combined results of mass loss, hydrogen evolution, and electrochemical measurements indicated that Mg-3Al-1Sn had a low corrosion rate. The SKPFM results showed that the Volta potential of Mg _2 Sn particles, Al-Mn, and β -Mg _17 Al _12 phases were 100, 80, and 50 mV higher than the matrix, respectively. Therefore, the Mg _2 Sn phase that formed in Mg-3Al-xSn served as a local cathode due to its high potential, which accelerated microgalvanic corrosion along with the secondary local cathode (Al-Mn). The Sn solution strengthening and secondary phase strengthening (fine Mg _2 Sn particles) improved the mechanical properties of the Mg-3Al-xSn alloys.

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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