Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 757, Issue -, Pages 259-264Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2018.05.063
Keywords
Al-Zn-Mg alloy; Zn/Mg ratio; Microstructure; Corrosion properties
Categories
Funding
- National Key Research and Development Program of China [2016YFB0300801]
- State Key Laboratory of High Performance Complex Manufacturing of Central South University [ZZYJKT2017-02]
- Major Research Equipment Development Projects of National Natural Science Foundation of China [51327902]
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A detailed investigations of Zn/Mg ratios on stress corrosion cracking(SCC), electrochemical corrosion properties and precipitates of Al-Zn-Mg alloy with Zn+Mg 7 wt% were studied by mechanical, stress corrosion cracking(SCC), electrochemical cyclic polarization together with transmission electron microscopy (TEM) microstructural examinations. It is shown that the strength, SCC and electrochemical corrosion resistance are significantly increased with the decrease of Zn/Mg ratio. The strength of the alloys are significantly increases with the decrease of Zn/Mg ratio, which was attributed to increase the volume fraction of matrix precipitates. The enhance of SCC resistance and electrochemical corrosion properties was attributed to the narrower width of FEZ and low concentration of Zn in aluminum matrix. (C) 2018 Elsevier B.V. All rights reserved.
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