Journal
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
Volume 22, Issue 1, Pages 47-52Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S1003-6326(11)61138-2
Keywords
7085 aluminum alloy; quenching rate; microstructure; stress corrosion cracking
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Funding
- National Basic Research Program of China [2010CB731701, 2012CB619502]
- Creative Research Group of National Natural Science Foundation of China [51021063]
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The influence of quenching rate on microstructure and stress corrosion cracking (SCC) of 7085 aluminum alloy was investigated by tensile test, slow strain rate test (SSRT), combined with scanning electron microscopy (SEM), transmission electron microscopy (TEM) and electrochemical test. The results show that with decreasing the quenching rate, the size and inter-particle distance of the grain boundary precipitates as well as precipitation free zone width increase, but the copper content of grain boundary precipitates decreases. The SCC resistance of the samples increases first and then decreases, which is attributed to the copper content, size and distribution of grain boundary precipitates.
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