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Exploring failure modes of alumina scales on FeCrAl and FeNiCrAl alloys in a nitriding environment

Mortazavi, A.N.; Esmaily, M; Geers, C; Birbilis, Nick; Svensson, Jan-Erik; Halvarsson, M; Chandrasekaran, D; Johansson, L.G.


Two high-temperature FeCrAl and FeNiCrAl alloys were exposed in a strongly nitriding environment at 900C and the morphology of nitridation was studied. Quasi-in-situ experiments revealed that nitridation started at specific surface sites directly related to the alloy microstructure where the alumina scale was permeable to nitrogen. FeCrAl alloy grains with (112) orientation formed outward-growing alumina scales and were susceptible to nitridation. Outward-growing scales and substrate...[Show more]

CollectionsANU Research Publications
Date published: 2020
Type: Journal article
Source: Acta Materialia
DOI: 10.1016/j.actamat.2020.09.058
Access Rights: Open Access


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