Spheroidizing Behavior and Spheroidizing Kinetics of W-phase During Solid-Solution Treatment in Mg–Zn–Y–Mn–(B)Alloys  

作　　者：Kai Yang Jin-Shan Zhang Xi-Mei Zong Wei Liu Chun-Xiang Xu 

机构地区：[1]College of Materials Science and Engineering,TaiyuanUniversity of Technology [2]Taiyuan 030024,China [2]Shanxi Key Laboratory of Advanced Magnesium-based Materials,Taiyuan 030024,China

出　　处：《Acta Metallurgica Sinica(English Letters)》2017年第5期464-469,共6页金属学报（英文版）

基　　金：support from the National Natural Science Foundation of China(Nos.51474153 and 51574175);Ph.D.Programs Foundation of Ministry of Education of the People’s Republic of China(No.20111402110004);Natural Science Foundation of Shanxi Province(Nos.2009011028-3 and 2012011022-1)

摘　　要：The spheroidizing mechanism of W-phase in the Mg–Zn–Y–Mn–（B） alloys during solid-solution treatment was investigated by using kinetic methodologies. The microstructure and mechanical properties of heat-treated Mg_（94）Zn_（2.5）-Y_（2.5）Mn_1 alloy containing 0.003 wt% B were compared with heat-treated Mg_（94）Zn_（2.5）-Y_（2.5）Mn_1 alloy. The heat-treated Mg_（94）Zn_（2.5）-Y_（2.5）Mn_1 alloy with 0.003 wt% B contained fine and uniform W-phase particles, which exhibited optimal mechanical performance. The ultimate tensile strength, yield strength and elongation were 287.7, 125.5 MPa and 21.1%,respectively.The spheroidizing mechanism of W-phase in the Mg–Zn–Y–Mn–（B） alloys during solid-solution treatment was investigated by using kinetic methodologies. The microstructure and mechanical properties of heat-treated Mg_（94）Zn_（2.5）-Y_（2.5）Mn_1 alloy containing 0.003 wt% B were compared with heat-treated Mg_（94）Zn_（2.5）-Y_（2.5）Mn_1 alloy. The heat-treated Mg_（94）Zn_（2.5）-Y_（2.5）Mn_1 alloy with 0.003 wt% B contained fine and uniform W-phase particles, which exhibited optimal mechanical performance. The ultimate tensile strength, yield strength and elongation were 287.7, 125.5 MPa and 21.1%,respectively.

关 键 词：Magnesium alloys W-phase Spheroidizing Kinetics Microstructure Mechanical properties 

分 类 号：TG146.22[一般工业技术—材料科学与工程] TG166.4[金属学及工艺—金属材料]