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Journal of Materials Engineering and Performance

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24-08-2021

Stress Corrosion Cracking Susceptibility of Additively Manufactured Aluminum Alloy 7050 Produced by Selective Laser Melting in Chloride Environments

Authors: Kevin R. Chasse, Rupesh Rajendran, Crosby T. Owens, Preet M. Singh

Published in: Journal of Materials Engineering and Performance | Issue 9/2021

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Abstract

Additively manufactured, high-strength aluminum alloy 7050 (Al-Zn-Mg-Cu) produced by selective laser melting (SLM) was evaluated for stress corrosion cracking (SCC) susceptibility in chloride-containing environments relative to 7050-T7451 wrought plate. Constant extension rate tests and constant strain tests were conducted in 3.5% sodium chloride (NaCl) solutions. Test coupons were characterized for evidence of SCC following the test. The effects of chloride concentration and the presence of an oxidizer, i.e., hydrogen peroxide, on SCC and corrosion susceptibility were also studied. Results of the experiments implied that the 7xxx-series SLM alloy generally showed similar susceptibility to the 7050-T7451 plate with limited SCC initiation in the chloride environments. The presence of hydrogen peroxide changed the corrosion mode to intergranular corrosion and pitting.

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Title: Stress Corrosion Cracking Susceptibility of Additively Manufactured Aluminum Alloy 7050 Produced by Selective Laser Melting in Chloride Environments
Authors: Kevin R. Chasse
Rupesh Rajendran
Crosby T. Owens
Preet M. Singh
Publication date: 24-08-2021
Publisher: Springer US
Published in: Journal of Materials Engineering and Performance / Issue 9/2021
Print ISSN: 1059-9495
Electronic ISSN: 1544-1024
DOI: https://doi.org/10.1007/s11665-021-06135-y

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