Effects of yttrium addition on microstructure and mechanical properties of as-extruded AZ31 magnesium alloys

作     者：潘复生 陈美宝 王敬丰 彭建 汤爱涛 

作者机构：National Engineering Research Center for Magnesium AlloysChongqing University School of Safety EngineeringChongqing University of Science and Technology 

出 版 物：《中国有色金属学会会刊：英文版》 (Transactions of Nonferrous Metals Society of China)

年 卷 期：2008年第18卷第A01期

页      面：1-6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：Project(50725413)supported by the National Natural Science Fundation of China Project(2007CB613704)supported by the NationalBasic Research Program of China 

主　　题：镁合金 稀有金属 微观结构 调查 研究 

摘      要：The effects of yttrium addition on microstructure and mechanical properties of as-extruded AZ31 magnesium alloys were investigated by OM,XRD and *** results show that the addition of yttrium results in the formation of a new phase,Al_2Y. When the addition of yttrium is higher than 1.48%-2.91%(mass fraction),another new phase,Al_3Y_5Mn_7,forms,and the amount ofβ-Mg_(17)Al_(12) phase in the AZ31 alloy decreases *** tensile test at room temperature indicates that the yield strength of as-extruded AZ31 alloys improves with the addition of yttrium,but the elongation decreases,which is possibly related to the formation of coarse blocky compounds containing yttrium and the grain coarsening in the alloys.