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

被引：3
作者：
Kang, S. W. [1 ]
Kang, H. [2 ]
Bae, D. H. [1 ]
机构：
[1] Yonsei Univ, Dept Mat Sci & Engn, 50 Yonsei Ro, Seoul 03722, South Korea
[2] Hyundai Steel Co, Hyundai Steel R&D Ctr, Adv Res Team, 1480 Bukbusaneop Ro, Dangjin Si 31719, Chungnam, South Korea
来源：
MATERIALS LETTERS | 2018年 / 219卷
基金：
新加坡国家研究基金会;
关键词：
Mg-O-Al alloy; Die-cast; Nucleation site; Cell size; GRAIN-REFINEMENT; MAGNESIUM ALLOYS; AL;
D O I：
10.1016/j.matlet.2018.02.023
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
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. (C) 2018 Published by Elsevier B.V.
引用
收藏
页码：16 / 18
页数：3
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