热挤压Mg-3Sn-1Zn-<i>x</i>Cu合金的显微组织与力学性能

doi:10.11896/j.issn.1005-023X.2018.20.012

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Abstract Effects of Cu on microstructure and mechanical properties of hot-extruded Mg-3Sn-1Zn alloy were investigated. The results showed that the grain size of the hot-extruded Mg-3Sn-1Zn alloy was remarkably refined with a small amount of Cu, and the thermostable CuMgZn phase was formed in the alloys. Therefore, the strength and plasticity of the hot-extruded Mg-3Sn-1Zn-xCu alloys improved. The grain of the hot-extruded Mg-3Sn-1Zn-0.5Cu alloy was the finest with a size of 2.8 μm. The tensile yield strength and elongation of the hot-extruded Mg-3Sn-1Zn-0.5Cu alloy at room temperature were 241 MPa and 20.3%, respectively, which were superior to that of the hot-extruded AZ31B alloy. In addition, the tensile yield strength of the Mg-3Sn-1Zn-0.5Cu alloy at 150 ℃ was 128 MPa, which was better than that of as-cast AE42 alloy.

Key words： Cu Mg-3Sn-1Zn alloy hot-extrusion microstructure mechanical properties

Published: 22 November 2018

CLC number:

TG146.2+2

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	Articles by authors
	CHENG Peng
	CHEN Yungui
	DING Wucheng
	WANG Chunming

Cite this article:

CHENG Peng,CHEN Yungui,DING Wucheng, et al. Microstructure and Mechanical Properties of Hot-extruded Mg-3Sn-1Zn-xCu Alloys[J]. Materials Reports, 2018, 32(20): 3562-3565.

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http://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2018.20.012 OR http://www.mater-rep.com/EN/Y2018/V32/I20/3562

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