Understanding the Origins of Intergranular Corrosion in Copper-Containing Al-Mg-Si Alloys

Shravan K. Kairy, Talukder Alam, Paul A. Rometsch, Chris H.J. Davies, Raj Banerjee, Nick Birbilis

Research output: Contribution to journalArticleResearchpeer-review

Abstract

A definitive understanding of the mechanism of intergranular corrosion (IGC) in under-aged (UA) Cu-containing Al-Mg-Si alloys has not been clear to date. The grain boundary microstructure and chemistry in an UA Cu-containing Al-Mg-Si alloy were characterized by coupling atom probe tomography and scanning transmission electron microscopy. The rapid formation of an ultra-thin wetting Cu layer and discrete Q-phase (Al4Cu2Mg8Si7) precipitates along the grain boundaries, and a precipitate-free zone adjacent to the grain boundaries in the UA condition contribute to IGC.

Original languageEnglish
Pages (from-to)985-989
Number of pages5
JournalMetallurgical and Materials Transactions A - Physical Metallurgy and Materials Science
Volume47A
Issue number3
DOIs
Publication statusPublished - 1 Mar 2016

Cite this

Kairy, Shravan K. ; Alam, Talukder ; Rometsch, Paul A. ; Davies, Chris H.J. ; Banerjee, Raj ; Birbilis, Nick. / Understanding the Origins of Intergranular Corrosion in Copper-Containing Al-Mg-Si Alloys. In: Metallurgical and Materials Transactions A - Physical Metallurgy and Materials Science. 2016 ; Vol. 47A, No. 3. pp. 985-989.
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Understanding the Origins of Intergranular Corrosion in Copper-Containing Al-Mg-Si Alloys. / Kairy, Shravan K.; Alam, Talukder; Rometsch, Paul A.; Davies, Chris H.J.; Banerjee, Raj; Birbilis, Nick.

In: Metallurgical and Materials Transactions A - Physical Metallurgy and Materials Science, Vol. 47A, No. 3, 01.03.2016, p. 985-989.

Research output: Contribution to journalArticleResearchpeer-review

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