Enhanced Damping Capacities of Mg-Ce Alloy by the Special Microstructure with Parallel Second Phase
Enhanced Damping Capacities of Mg-Ce Alloy by the Special Microstructure with Parallel Second Phase
复制标题
平行第二相特殊微观结构增强Mg-Ce合金的阻尼能力
DOI：
10.1016/j.jmst.2016.06.027
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发表时间：
2017-09-01
影响因子：
10.9
通讯作者：
Pan, Fusheng
中科院分区：
文献类型：
--
作者：
Wu, Zhongshan;Wang, Jingfeng;Pan, Fusheng
Microstructure evolution and damping capacities of Mg-Ce binary alloys with three different Ce contents (0.5, 1, or 2 wt%) have been systematically investigated in this work. Numerous fine parallel second phases in Mg-2Ce alloy are obtained, as well as a large number of dislocations around them, but few dislocations appear around the reticular second phase in the Mg-1Ce alloy. Among the three alloys, two internal friction peaks (P-1 and P-2) are detected at about 78 and 167 degrees C in both the Mg-0.5Ce and Mg-1Ce alloys. In addition, the alloy with special parallel second phase structure exhibits excellent damping capacity in both strain amplitude and temperature-dependent regions. These results may be ascribed to the stress concentration and the formation of abundant parallel and uniform dislocation configurations in the alpha-Mg matrix without the influence of crystal orientation. The obtained results may provide a novel idea to prepare high-damping magnesium alloys by tailoring their microstructure. (C) 2016 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
