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Microstructure and mechanical properties of as-cast Mg-5Sn-2Ce-xZn alloys 被引量:3
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作者 DING Wucheng CHEN Yungui +2 位作者 XIAO Sufen CUI Zhiming CHENG Peng 《Journal of Rare Earths》 SCIE EI CAS CSCD 2017年第6期585-592,共8页
The microstructure, mechanical properties and compression creep resistance of as-cast Mg-5Sn-2Ce-xZn(x=0, 2 wt.%, 4 wt.%) alloys were investigated in this paper. The results showed that the Ce-containing compounds w... The microstructure, mechanical properties and compression creep resistance of as-cast Mg-5Sn-2Ce-xZn(x=0, 2 wt.%, 4 wt.%) alloys were investigated in this paper. The results showed that the Ce-containing compounds were MgS nC e phase and an unknown phase, and they were the dominant intermetallics in as-cast Mg-5Sn-2Ce-xZn alloys. At x=0 wt.%, the Ce-containing compounds formed in interdendritic regions with the shape of rod. As the Zn content was increased to 2 wt.%, the Ce-containing compounds partly changed from rod-like to sheet-like. However, there were few further changes in the Ce-containing compounds with further increase in Zn content to 4 wt.%. Compared with Mg-5Sn-2Ce alloy, the tensile strength and elongation of the alloy containing 4 wt.% Zn increased by 39% and 112%, respectively, and the secondary creep rate(175 °C/55 MPa) decreased at least by an order of magnitude. These improvement could be attributed to the combined effects of the high content of Zn dissolving in a-Mg matrix and the modification of Ce-containing compounds by Zn addition. 展开更多
关键词 creep tensile attributed solute magnesium eutectic sheet elongation refined ductility
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