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Journal of Materials Engineering and Performance

Published in:

24-04-2019

Microstructure and Mechanical Properties of Extruded Mg-7Sn-5Zn-xAl (x = 0, 1, 2 and 3 wt.%) Alloy

Authors: Jing Jiang, Tingqu Li, Guang-Li Bi, Feng-Yun Yan, Chi Cao, Yuan-Dong Li, Ying Ma

Published in: Journal of Materials Engineering and Performance | Issue 5/2019

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Abstract

Microstructure and mechanical properties of extruded Mg-7Sn-5Zn-xAl (x = 0, 1, 2 and 3 wt.%) alloy were investigated. The as-cast Mg-7Sn-5Zn alloy mainly comprised α-Mg dendrites, Mg₂Sn and nanosized Mg-Zn phases in a Mg matrix, whereas the quasicrystal (icosahedral (I)) phase precipitated with the addition of Al. After extrusion, the grain size decreased due to dynamic recrystallization and the resulting particles were crushed and distributed along the extrusion direction. The highest tensile strength was exhibited by the extruded Mg-7Sn-5Zn-2Al alloy, which had a yield strength, ultimate tensile strength and elongation to failure of 198, 343 MPa and 18.7%, respectively. The high tensile strength was mainly attributed to grain refinement and precipitation strengthening of the Mg₂Sn and icosahedral phases.

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Title: Microstructure and Mechanical Properties of Extruded Mg-7Sn-5Zn-xAl (x = 0, 1, 2 and 3 wt.%) Alloy
Authors: Jing Jiang
Tingqu Li
Guang-Li Bi
Feng-Yun Yan
Chi Cao
Yuan-Dong Li
Ying Ma
Publication date: 24-04-2019
Publisher: Springer US
Published in: Journal of Materials Engineering and Performance / Issue 5/2019
Print ISSN: 1059-9495
Electronic ISSN: 1544-1024
DOI: https://doi.org/10.1007/s11665-019-04053-8

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