Journal
CORROSION SCIENCE
Volume 54, Issue -, Pages 17-25Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2011.08.042
Keywords
Aluminium; Stress corrosion; Anodic dissolution
Funding
- Aluminium Corporation of China Ltd. (CHALCO)
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The effects of processing condition variations in the retrogression and re-ageing (RRA) treatment of AA7150 have been investigated. The results reveal that the corrosion resistance and strength of RRA-treated samples are sensitive to the pre-ageing temperature and retrogression heating rate. With an intermediate pre-ageing temperature of 60 degrees C and a slow retrogression heating rate of 5 degrees C/min, RRA-treated samples can be tailored towards a good combination of both corrosion resistance and strength, owing to a smaller potential difference between grain-boundary precipitates and the matrix, and a larger volume fraction of strengthening precipitates in the matrix. Crown Copyright (C) 2011 Published by Elsevier Ltd. All rights reserved.
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