Microstructure and mechanical properties of an Al-12.7Si-0.7Mg alloy processed by extrusion and heat treatment

被引：45
|
作者：
Liu Fang [2 ]
Yu Fuxiao [1 ]
Zhao Dazhi [1 ]
Zuo Liang [2 ]
机构：
[1] Northeastern Univ, Coll Mat & Met, Shenyang 110819, Peoples R China
[2] Northeastern Univ, Key Lab Anisotropy & Texture Mat, Minist Educ, Shenyang 110819, Peoples R China
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2011年 / 528卷 / 10-11期
基金：
国家高技术研究发展计划(863计划); 中国国家自然科学基金;
关键词：
Al-Si alloy; DC cast; Extrusion; Microstructure; Tensile properties; MG-SI ALLOYS; AL; DEFORMATION; FRACTURE; ZONES; PHASE;
D O I：
10.1016/j.msea.2011.01.041
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Direct chill (DC) cast Al-12.7Si-0.7Mg alloy without chemical modification was hot extruded and subsequently heat-treated under various conditions. The microstructure and tensile properties of the extruded profile were investigated aiming at understanding the strengthening mechanisms. The results show that the refined microstructure characterized by fine Si particles uniformly distributed in the Al matrix of fine equiaxed grains was promoted by hot extrusion. The alloy after T6 treatment exhibits good ductility and much higher proof strength as well as tensile strength compared to 6063 alloy in general. The strengthening was attributed to be the combining effect of particle, grain boundary and precipitation strengthening. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：3786 / 3790
页数：5
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