Microstructure,mechanical properties and fracture behavior of a new WE43 alloy

• 作者: Gui-Long Jia Li-Ping Wang Yi-Cheng Feng Er-Jun Guo Yan-Hong Chen Chang-Liang Wang
• 来源期刊: 稀有金属（英文版）
• 年，卷（期）: 2021,（8）
• 所属期刊栏目: ORIGINAL ARTICLES
• 页码范围: 2197-2205
• 页数: 9页
• 语种: 英文

摘要

The microstructures,mechanical properties and fracture behaviors of a new WE43 alloy (Mg-4Y-1.6Nd-2Sm-0.5Zr) were investigated.The microstructure of the as-cast alloy includes a Mg matrix,Mg41Sm5,Mg41Nd5 and Mg24Y5 eutectic phases,as well as β-phase.After an optimal solution treatment,the eutectic phases are almost completely dissolved;only a few spots of blocky Mg-Y compounds remain at grain boundaries.After an aging treatment,a large amount of β'-phases are dispersed and precipitated at the grain interior,which provides good comprehensive mechanical properties of the alloy,partic-ularly in the under-aged state.The tensile strength is up to 290 MPa,the yield strength reaches 209 MPa,and the elongation is slightly improved.Furthermore,the fracture behaviors of the studied alloy in different states signifi-cantly differ.In addition,a comparison of mechanical properties of the new WE43,traditional WE43 and other modified WE43 alloys is presented.