@inproceedings{665770a31937453695d9df7a2cc87293,
title = "On the loss of protective scale formation in creep-resistant, alumina-forming austenitic stainless steels at 900°C in air",
abstract = "A family of creep-resistant, Al2O3-forming austenitic (AFA) stainless steels was recently developed. The alloys exhibit excellent oxidation resistance up to ∼800°C, but are susceptible to internal attack of Al at higher temperatures. In the present work, higher levels of Ni, Cr, Al, and Nb additions were found to correlate with improved oxidation behavior at 900°C in air. The alloys generally appeared to be initially capable of external Al2O3 scale formation, with a subsequent transition to internal attack of Al (internal oxidation and internal nitridation) that is dependent on alloy composition. Compositional profiles at the alloy/scale interface suggest that the transition to internal oxidation is preceded by subsurface depletion of Al in the lower-Al compositions. In higher Al-containing compositions, NiAl second-phase precipitates act as an Al reservoir, and Al depletion may not be a key factor. Alloy design directions to increase the upper-temperature limit of protective Al2O3 scale formation in these alloys are discussed.",
keywords = "Alumina, Austenitic stainless steel, Internal oxidation, Third-element effect",
author = "Brady, {M. P.} and Y. Yamamoto and Pint, {B. A.} and Santella, {M. L.} and Maziasz, {P. J.} and Walker, {L. R.}",
year = "2008",
doi = "10.4028/www.scientific.net/msf.595-598.725",
language = "English",
series = "Materials Science Forum",
publisher = "Trans Tech Publications Ltd",
pages = "725--732",
editor = "Pierre Steinmetz and Stephane Mathieu and Wright, {Ian G.} and Alain Galerie and Alain Galerie and Daniel Monceau",
booktitle = "High Temperature Corrosion and Protection of Materials 7 - Selected, peer Reviewed Papers from 7th International Symposium on High Temperature Corrosion and Protection of Materials",
note = "7th International Symposium on High Temperature Corrosion and Protection of Materials ; Conference date: 18-05-2008 Through 23-05-2008",
}
