中南大学学报（英文版）
中南大學學報（英文版）
중남대학학보（영문판）
Journal of Central South University
2015年
11期
4123-4127
,共5页
杜兴蒿%魏成宾%武保林%洪敏%夏宇航%李万鹏
杜興蒿%魏成賓%武保林%洪敏%夏宇航%李萬鵬
두흥호%위성빈%무보림%홍민%하우항%리만붕
Mg alloys%extrusion%mechanical properties%microstructure%long packed stacking ordered (LPSO) phase
The microstructure and properties of a quarternary Mg-8Er-5Zn-0.5Zr (mass fraction, %) alloy with the low Er/Zn mass ratio of 1.60 were investigated. It is found that despite of the low Er/Zn mass ratio, the microstructure of the as-prepared alloy is composed ofα-Mg, W phase with face-centered cubic structure and long packed stacking ordered (LPSO) phase. As expected, the extruded and annealed alloy possesses high yield stress (310 MPa) and good elongation (14%) at room temperature. The superior mechanical properties can be interpreted in terms of the promising microstructure characteristic of fineα-Mg recrystallized grains embedded with high-density fine lamellar-shaped LPSO phase and block W phase structure.
