Microstructure and mechanical properties of a die-cast Mg-9Al alloy containing oxygen atoms

作者：Kang S W; Kang H; Bae D H^*

来源：Materials Letters, 2018, 219: 16-18.

DOI：10.1016/j.matlet.2018.02.023

• Mg-O-Al alloy
• Die-cast
• Nucleation site
• Cell size

In this study, the microstructural features and mechanical properties of a high-pressure die-cast (DC) Mg-9Al alloy containing oxygen atoms (Mg-O-9Al alloy) were characterized. The oxygen atoms promoted the formation of nucleation sites of alpha-Mg under high pressure, including fine cells (12-13 mu m), and reduced the number of defect bands compared to the DC Mg-9Al alloy (14-15 mu m). The relation between hardness and phase spacing indicated that the dispersion strengthening of the beta-phase was dominant. The DC Mg-O-9Al alloy exhibited enhanced tensile properties as compared to the DC Mg-9Al alloy.

• 出版日期2018-5-15