Large strain work hardening of aluminum alloys and the effect of Mg in solid solution

被引:25
作者
Ryen, Oyvind
Laukli, Hans Ivar
Holmedal, Bjorn
Nes, Erik
机构
[1] Norwegian Univ Sci & Technol, N-7034 Trondheim, Norway
[2] Hydro Aluminum, Sunndalsora, Norway
来源
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2006年 / 37A卷 / 06期
关键词
D O I
10.1007/s11661-006-0143-6
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The work-hardening behavior of a range of aluminum-magnesium alloys, from 0.5 to 4.55 wt pct Mg, is followed up to large strains using compression testing and cold rolling. At large strains, stage IV, an unexpectedly low work-hardening rate of high-Mg alloys is observed, and the work-hardening rate in stage IV is almost unaffected by the Mg content. A model for work hardening is applied and discussed in relation to the experimental observations. Based on microstructural observations of the cold-rolled materials, the low work-hardening rate of high-Mg alloys is ascribed to a different storage pattern of dislocations caused by an increased amount of shear bands and a higher dislocation density inside subgrains.
引用
收藏
页码:2007 / 2013
页数:7
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