Influence of Severe Plastic Deformation on Precipitation Hardening in an Al-Mg-Si Alloy: Microstructure and Mechanical Properties

被引：18

作者：

Tsai, Meng-Shan ^{[2
]}

Sun, Pei-Ling ^{[1
]}

Kao, Po-Wen ^{[2
]}

Chang, Chih-Pu ^{[2
]}

机构：

[1] Feng Chia Univ, Dept Mat Sci & Engn, Taichung 40724, Taiwan

[2] Natl Sun Yat Sen Univ, Inst Mat Sci & Engn, Kaohsiung 80424, Taiwan

来源：

MATERIALS TRANSACTIONS | 2009年 / 50卷 / 04期

关键词：

aging; precipitation; mechanical properties; aluminum alloy; equal channel angular extrusion; CHANNEL; TEMPERATURE; STRENGTH;

D O I：

10.2320/matertrans.MRA2008468

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Equal channel angular extrusion (ECAE) is applied to an age-hardening Al-Mg-Si alloy at temperatures where concurrent aging (dynamic aging) can occur to form fine beta ''-Mg2Si precipitates, and all ultrafine-grained matrix with high dislocation density can be maintained. This microstructure results in significant strength enhancement with little sacrifice in tensile ductility. The large plastic strain imposed by ECAE causes a fraction of the precipitates to dissolve into the aluminum matrix, which re-precipitate during subsequent aging treatment. [doi: 10.2320/matertrans.MRA2008468]

引用

页码：771 / 775

页数：5

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