Microstructural Evolution in Various Regions of Stir Zone during Friction Stir Processing of Al-7Si-0.3Mg Cast Alloy

被引：3
|
作者：
Chen, Zhan W. [1 ]
Cui, Song [1 ]
Gao, Wei [2 ]
Zhu, Tianping [2 ]
机构：
[1] AUT Univ, Dept Mech & Mfg Engn, Auckland, New Zealand
[2] Univ Auckland, Dept Chem & Mat Engn, Auckland, New Zealand
来源：
PRICM 7, PTS 1-3 | 2010年 / 654-656卷
关键词：
Friction stir; materials flow; cast and wrought microstructures;
D O I：
10.4028/www.scientific.net/MSF.654-656.962
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Castings may be used more as structural components if friction stir (FS) processing could refine the microstructures satisfactorily. For this, material flow and the formation of various microstructural regions during FS were studied. It was found that alpha-Al dendrites and eutectic Al-Si were sheared into the thread spaces and the microstructures were significantly modified and refined. Material merely dragged into the FS zone remains microstructurally segregated. The volume of each flow was affected by rotation speed and forward speed and the reason for this is explained. Finally, textures determined together with the strain values estimated are presented to discuss further the microstructual development in various stir zones.
引用
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页码：962 / +
页数：2
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