Effects of precipitates and its interface on thermal conductivity of Mg-12Gd alloy during aging treatment
How to simultaneously improve the thermal conductivity and mechanical properties of Mg alloys is an interesting and important issue topic.In the present study,the effect of aging treatment on the thermal conductivity and micro-hardness of Mg–12Gd alloy was investigated.Results indicated that the thermal conductivity and micro-hardness of the alloy could be significantly improved by aging treatment,and Mg–12Gd alloy exhibited a typical aging hardening response with the increasing aging time.At the early stage of aging(4 h),a large number of fine particles precipitated from α-Mg matrix,but thermal conductivity of alloy increased a little,which was attributed to the coherent interface hindering the increase of thermal conductivity.The thermal conductivity increased to the peak value of 75.7 W/(m·K)at the aging time of 300 h,which was about 2.17 times that of assolutionized alloy.The huge increment in the thermal conductivity of as-aged Mg–12Gd alloy was related to the precipitation of particles and the incoherent interface between precipitates and α-Mg matrix.
Mg alloys Aging treatment Thermal conductivity
Liping Zhong Yongjian Wang Min Gong Xingwen Zheng Jian Peng
College of Materials Science and Engineering,Sichuan University of Science and Engineering,Zigong 64 State Key Laboratory of Mechanical Transmission,College of Materials Science and Engineering,Chongqi
国内会议
四川自贡
英文
67-73
2018-05-25（万方平台首次上网日期，不代表论文的发表时间）