In-service sensitization of a microstructurally heterogeneous AA5083 alloy

W. Wei, Sergio Gonzalez Sanchez, Teruo Hashimoto, R. R. Abuaisha, George Thompson, Xiaorong Zhou

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

It was revealed that an AA5083 alloy had been severely sensitized after 40 years in service at ground atmosphere temperature. The degree of sensitization of the various regions through the alloy plate thickness is different, which is associated with the non-uniform distribution of Mg through the plate thickness. The alloy plate exhibits Mg-rich bands that promoted the heterogeneous distribution of Mg-containing precipitates. The composition of these precipitates ranges from that for low Mg content intermetallics to that of the β′ phase. Structure characterization revealed the β′ phase and a cubic Al-Mg phase that has lower magnesium contents compared to the β phase.
Original languageEnglish
Pages (from-to)378-386
JournalMaterials and Corrosion
Volume67
Issue number4
Early online date13 Aug 2015
DOIs
Publication statusPublished - Apr 2016

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