Stress Corrosion Cracking in an Extruded Cu-Free Al-Zn-Mg Alloy

被引：5
作者：
Lervik, Adrian [1 ]
C. Walmsley, John [1 ,2 ,3 ]
Lodgaard, Lars [4 ]
D. Marioara, Calin [3 ]
Johnsen, Roy [5 ]
Lunder, Otto [3 ]
Holmestad, Randi [1 ]
机构：
[1] Norwegian Univ Sci & Technol NTNU, Dept Phys, N-7491 Trondheim, Norway
[2] Univ Cambridge, Dept Mat Sci & Met, Cambridge CB2 3QZ, England
[3] SINTEF Ind, N-7465 Trondheim, Norway
[4] Benteler Automot, N-2830 Raufoss, Norway
[5] Norwegian Univ Sci & Technol NTNU, Dept Mech & Ind Engn, N-7491 Trondheim, Norway
来源：
METALS | 2020年 / 10卷 / 09期
关键词：
aluminium alloys; stress corrosion cracking; transmission electron microscopy; EBSD; microstructure; grain boundaries; GRAIN-BOUNDARY SEGREGATION; ALUMINUM-ALLOYS; HYDROGEN EMBRITTLEMENT; COPPER CONTENT; ATOM-PROBE; MICROSTRUCTURE; PRECIPITATION; NUCLEATION; EVOLUTION; BEHAVIOR;
D O I：
10.3390/met10091194
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Stress corrosion cracking (SCC) in Cu-free Al-Zn-Mg (7xxx) aluminium alloys limits its use in many applications. In this work, we study in detail the microstructure of a peak and slightly overaged condition in an AA7003 alloy using transmission- and scanning electron microscopy in order to provide a comprehensive understanding of the microstructural features related to SCC. The SCC properties have been assessed using the double cantilever beam method and slow strain rate tensile tests. Grain boundary particles, precipitate free zones, and matrix precipitates have been studied. A difference in the SCC properties is established between the two ageing conditions. The dominating difference is the size and orientation of the hardening phases. Possible explanations correlating the microstructure and SCC properties are discussed.
引用
收藏
页码：1 / 20
页数：20
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