Achieving exceptional superplasticity in a bulk aluminum alloy processed by high-pressure torsion

被引：87
|
作者：
Horit, Zenji [1 ]
Langdon, Terence G. [2 ,3 ,4 ]
机构：
[1] Kyushu Univ, Fac Engn, Dept Mat Sci & Engn, Fukuoka 8190395, Japan
[2] Univ So Calif, Dept Aerosp & Mech Engn, Los Angeles, CA 90089 USA
[3] Univ So Calif, Dept Mat Sci, Los Angeles, CA 90089 USA
[4] Univ Southampton, Sch Engn Sci, Mat Res Grp, Southampton SO17 1BJ, Hants, England
来源：
SCRIPTA MATERIALIA | 2008年 / 58卷 / 11期
基金：
美国国家科学基金会;
关键词：
aluminum alloy; high-pressure torsion; severe plastic deformation; superplasticity;
D O I：
10.1016/j.scriptamat.2008.01.043
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Bulk specimens of an aluminum-magnesium-scandium alloy, in the form of small cylinders, were processed by high-pressure torsion at room temperature. Following processing, the microstructure was inhomogeneous with larger grains in the center and ultrafine grains of similar to 130 nm at the periphery. Tensile testing after processing revealed the potential for achieving exceptional super-plastic elongations but the measured elongations depended upon the positions of the specimens within the cylinder. The highest tensile elongation recorded in these experiments was 1600%. (c) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：1029 / 1032
页数：4
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