High-strength extruded Mg-Al-Ca-Mn alloy

被引：210
|
作者：
Xu, S. W. [1 ]
Oh-ishi, K. [1 ]
Kamado, S. [1 ]
Uchida, F. [1 ]
Homma, T. [1 ]
Hono, K. [2 ]
机构：
[1] Nagaoka Univ Technol, Dept Mech Engn, Nagaoka, Niigata 9402188, Japan
[2] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan
来源：
SCRIPTA MATERIALIA | 2011年 / 65卷 / 03期
关键词：
Magnesium alloy; Rare-earth-free; Extrusion; Microstructures; Mechanical properties;
D O I：
10.1016/j.scriptamat.2011.04.026
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
We have developed an extraordinary high-strength rare-earth-free magnesium (Mg) alloy by extruding a direct chill cast Mg3.5Al-3.3Ca-0.4Mn (wt.%) ingot. The as-extruded sample exhibited a tensile 0.2% proof stress of 410 MPa, an ultimate tensile strength of 420 MPa and an elongation to failure of 5.6%. The high strength is attributed to the combined effect of fine dynamically recrystallized grains pinned with fragmented Al-Ca intermetallic compounds, nanoscale plate-like Al-Ca precipitates, spherical Al-Mn-Ca precipitates and a strong basal texture. Crown Copyright (C) 2011 Published by Elsevier Ltd. on behalf of Acta Materialia Inc. All rights reserved.
引用
收藏
页码：269 / 272
页数：4
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