Achieving exceptionally high superplasticity at high strain rates in a micrograined Al-Mg-Sc alloy produced by friction stir processing

被引：91
作者：
Liu, F. C. [1 ]
Ma, Z. Y. [1 ]
机构：
[1] Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
来源：
SCRIPTA MATERIALIA | 2008年 / 59卷 / 08期
关键词：
superplasticity; friction stir processing; aluminum; microstructure; friction stir welding;
D O I：
10.1016/j.scriptamat.2008.06.035
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Friction stir processing (FSP) was applied to extruded Al-Mg-Sc alloy to produce fine-grained microstructure with 2.6 mu m grains. A maximum elongation of 2150% was achieved at 450 degrees C and a high strain rate of 1 x 10(-1) s(-1). Although the grains obtained by FSP were much larger than those by other techniques, such as equal-channel angular pressing, approximately the same superplasticity was achieved at an even higher strain rate in the FSP alloy. (c) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：882 / 885
页数：4
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