A high-performance Mg-Er-Zn-Zr alloy with low Er/Zn mass ratio
来源期刊：中南大学学报(英文版)2015年第11期
论文作者：DU Xing-hao WEI Cheng-bin WU Bao-lin HONG Min XIA Yu-hang LI Wan-peng
文章页码：4123 - 4127
Key words：Mg alloys; extrusion; mechanical properties; microstructure; long packed stacking ordered (LPSO) phase
Abstract: 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 of α-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 fine α-Mg recrystallized grains embedded with high-density fine lamellar-shaped LPSO phase and block W phase structure.
DU Xing-hao(杜兴蒿), WEI Cheng-bin(魏成宾), WU Bao-lin(武保林), HONG Min(洪敏), XIA Yu-hang(夏宇航), LI Wan-peng(李万鹏)
(School of Materials Science and Engineering, Shenyang Aerospace University, Shenyang 110314, China)
Abstract: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 of α-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 fine α-Mg recrystallized grains embedded with high-density fine lamellar-shaped LPSO phase and block W phase structure.
Key words:Mg alloys; extrusion; mechanical properties; microstructure; long packed stacking ordered (LPSO) phase
