Effect of Microstructure on the Localized Corrosion and Stress Corrosion Behaviours of Plasma-Electrolytic-Oxidation-Treated AA7075 Aluminum Alloy Forging in 3.5 wt. % NaCl Solution
Joint Authors
Panda, Rajiv
Venugopal, A.
Ramakrishna, L.
Sundararajan, G.
Sreekumar, K.
Manwatkar, Sushant
Source
International Journal of Corrosion
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-8, 8 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-03-26
Country of Publication
Egypt
No. of Pages
8
Main Subjects
Abstract EN
The influence of metallurgical heterogeneities such as coring and intermetallic phases on the corrosion and stress corrosion cracking behaviours of AA7075 aluminium alloy forging was examined in 3.5 wt. % NaCl solution with and without plasma electrolytic oxidation coating.
Electrochemical test results demonstrated significant improvement in the corrosion resistance of the alloy after PEO coating.
Stress corrosion results show that the metallurgical heterogeneities resulted in a loss in elongation of the uncoated sample in NaCl (11.5%) when compared to the one tested in air (12.9%).
The loss in elongation of the uncoated sample was shown to be due to localized corrosion-assisted mechanical cracking rather than true stress corrosion based on preexposure tensile tests followed by posttest metallographic observation of the stress corrosion tested samples.
This was further confirmed by the fractographic examination of the failed samples, which exhibited a typical ductile cracking morphology for all the coated and uncoated specimens.
American Psychological Association (APA)
Venugopal, A.& Panda, Rajiv& Manwatkar, Sushant& Sreekumar, K.& Ramakrishna, L.& Sundararajan, G.. 2012. Effect of Microstructure on the Localized Corrosion and Stress Corrosion Behaviours of Plasma-Electrolytic-Oxidation-Treated AA7075 Aluminum Alloy Forging in 3.5 wt. % NaCl Solution. International Journal of Corrosion،Vol. 2012, no. 2012, pp.1-8.
https://search.emarefa.net/detail/BIM-501014
Modern Language Association (MLA)
Venugopal, A.…[et al.]. Effect of Microstructure on the Localized Corrosion and Stress Corrosion Behaviours of Plasma-Electrolytic-Oxidation-Treated AA7075 Aluminum Alloy Forging in 3.5 wt. % NaCl Solution. International Journal of Corrosion No. 2012 (2012), pp.1-8.
https://search.emarefa.net/detail/BIM-501014
American Medical Association (AMA)
Venugopal, A.& Panda, Rajiv& Manwatkar, Sushant& Sreekumar, K.& Ramakrishna, L.& Sundararajan, G.. Effect of Microstructure on the Localized Corrosion and Stress Corrosion Behaviours of Plasma-Electrolytic-Oxidation-Treated AA7075 Aluminum Alloy Forging in 3.5 wt. % NaCl Solution. International Journal of Corrosion. 2012. Vol. 2012, no. 2012, pp.1-8.
https://search.emarefa.net/detail/BIM-501014
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-501014