The effect of cold deformation on the kinetics of the β" precipitates in an Al-Mg-Si alloy

被引：53
|
作者：
Yassar, RS [1 ]
Field, DP
Weiland, H
机构：
[1] Washington State Univ, Sch Mech & Mat Engn, Pullman, WA 99164 USA
[2] Alcoa Ctr, Alcoa Tech Ctr, Alcoa Ctr, PA 15069 USA
来源：
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2005年 / 36A卷 / 08期
关键词：
D O I：
10.1007/s11661-005-0326-6
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Kinetics of beta" precipitation in an Al-0.55 pct Mg-1.1 wt pct Si (AA6022) in both deformed and undeformed conditions were investigated by means of differential scanning calorimetry (DSC). Transmission electron microscopy (TEM) analysis on predeformed samples was also performed to study the effect of deformation on beta" precipitates. It was found that the introduction of dislocations changes the precipitate type from beta" to beta' and Q'. Also the measured activation energy for precipitate formation in the case of predeformed and undeformed samples was compared. The results show that dislocations facilitate precipitation by decreasing the activation energy.
引用
收藏
页码：2059 / 2065
页数：7
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