Grain refinement process in commercial 7075-T6 aluminum alloy under friction stir welding and superplasticity

被引：9
|
作者：
Motohashi, Y. [1 ]
Sakuma, T. [1 ]
Goloborodko, A. [1 ]
Ito, T. [1 ]
Itoh, G. [2 ]
机构：
[1] Ibaraki Univ, Res Ctr Superplast, Fac Engn, Hitachi, Ibaraki 3168511, Japan
[2] Ibaraki Univ, Dept Mech Engn, Fac Engn, Hitachi, Ibaraki, Japan
来源：
MATERIALWISSENSCHAFT UND WERKSTOFFTECHNIK | 2008年 / 39卷 / 4-5期
关键词：
high strength aluminum alloy; friction stir welding; grain refinement; continuous dynamic recrystallization;
D O I：
10.1002/mawe.200800288
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Process of grain refinement taking place during friction stir welding of a 7075-T6 Al alloy was studied. It appears that the fine-grained structure is formed by the grain fragmentation process, i.e., grains split by the development of internal boundaries with medium to high angle misorientations, mainly caused by dynamic recrystallization, followed by the evolution of new fine grains. The fine-grained alloy shows superplasticity at around 673K at strain-rate of 1 x 10(-3)s(-1).
引用
收藏
页码：275 / 278
页数：4
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