Precipitation microstructure of ultrafine-grained Al-Zn-Mg alloys processed by severe plastic deformation

被引：4
|
作者：
Gubicza, J.
Schiller, I.
Chinh, N. Q.
Illy, J.
机构：
[1] Eotvos Lorand Univ, Dept Solid State Phys, H-1518 Budapest, Hungary
[2] Eotvos Lorand Univ, Dept Gen Phys, H-1518 Budapest, Hungary
来源：
MATERIALS SCIENCE, TESTING AND INFORMATICS III | 2007年 / 537-538卷
关键词：
Equal Channel Angular Pressing; X-ray diffraction line profile analysis; supersaturated AlZnMg alloys; dislocation density; precipitation;
D O I：
10.4028/www.scientific.net/MSF.537-538.169
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Supersaturated Al-4.8Zn-1.2Mg-0.14Zr and Al-5.7Zn-1.9Mg-0.35Cu (wt.%) alloys were processed by Equal-Channel Angular Pressing (ECAP) at 200 degrees C. The crystallite size distribution and the characteristic parameters of the dislocation structure of both Al matrix and precipitates were determined by X-ray diffraction line profile analysis, which has been complemented by transmission electron microscopy (TEM) observations. Results of these investigations show that the bulk ultrafine-grained microstructure with high dislocation density produced by ECAP has strong influence on the precipitation process, resulting in high strength in both alloys.
引用
收藏
页码：169 / 176
页数：8
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