On the addition of precipitation- and work-hardening in an Al-Sc alloy

被引：20
|
作者：
Royset, Jostein [1 ]
Ryum, Nils [2 ]
Bettella, Diego [3 ]
Tocco, Alessio [3 ]
Jia, Zhihong [2 ]
Solberg, Jan Ketil [2 ]
Reiso, Oddvin [1 ]
机构：
[1] Hydro Aluminium R&D Sunndal, N-6600 Sunndalsora, Norway
[2] NTNU, Dept Mat Sci & Engn, N-7491 Trondheim, Norway
[3] Univ Politecn Marche, Dipartimento Meccan, I-60121 Ancona, Italy
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2008年 / 483-84卷
关键词：
Al-Sc; precipitation-hardening; work-hardening; dislocations; transmission electron microscopy;
D O I：
10.1016/j.msea.2006.09.164
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Specimens of Al-0.2 wt.% Sc were solution heat treated and subjected to precipitation heat treatment. Precipitation-hardening response depended on storage time after solution heat treatment. An underaged condition and an overaged condition with equal strengths were found. Transmission electron microscopy indicates that the dislocations pass the precipitates by shearing in the underaged condition, and not in the overaged conditions. Analyses of stress-strain curves show significant differences in work-hardening behaviour between the two conditions. (c) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码：175 / 178
页数：4
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