Enhanced Damping Capacities of Mg–Ce Alloy by the Special Microstructure with Parallel Second Phase

作     者：Zhongshan Wu Jingfeng Wang Haibo Wang She Ma Song Huang Shun Li Fusheng Pan 

作者机构：National Engineering Research Center for Magnesium AlloysCollege of Materials Science and EngineeringChongqing University The State Key Laboratory of Mechanical TransmissionChongqing University Institute of Applied ElectronicsChina Academy of Engineering Physics 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2017年第33卷第9期

页      面：941-946页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：financially supported by the National Natural Science Foundation of China (No. 51271206, No. 51571044) the National Basic Research Program of China (No. 2013CB632201) the Basic Research Project of Chongqing (cstc2015jcyj BX0081) National Key Research and Development Program (No. 2016YFB0301102) 

主　　题：Mg–Ce alloy Parallel second phase Dislocation configuration Damping capacity 

摘      要：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;and P;） are detected at about 78 and 167?C in both the Mg–0.5Ce and Mg–1Ce *** 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 ?-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.