Residual Stress Analysis in the Oxide Scales Formed on 316L Stainless Steel at 700 °C under Humid Air

Residual Stress Analysis in the Oxide Scales Formed on 316L Stainless Steel at 700 °C under Humid Air

L. Linwei, J. Vincent

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Abstract. The effects of water vapor on residual stresses in the oxide scales formed on 316L austenitic stainless steel are investigated. Samples were oxidized in thermogravimetric analyzer at 700°C for 6 hours – 96 hours with different amounts of water vapor (air, air+0.5%H2O, air+4.0%H2O). Grazing incidence X-ray diffraction (GIXRD) at different incident angles was used to study the phases and residual stresses in the oxide scales. The results demonstrate the formation of an inner chromia (Cr2O3) or chromium and iron solid solution (FexCr2-xO3) layer and an outer hematite (Fe2O3), iron and nickel metallic compound (FeNi3) and spinel layer. With the presence of water vapor, few wüstite (FeO) was also detected near the substrate. The residual stresses in the oxide scales are compressive, while the ones in the substrate are mostly tensile. Water vapor influenced not only the composition ratio of oxide scales and the residual stress levels but also the approach of oxide film damage.

Residual Stresses, High Temperature Oxidation, Water Vapor, X-Ray Diffraction

Published online 9/11/2018, 6 pages
Copyright © 2018 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA

Citation: L. Linwei, J. Vincent, ‘Residual Stress Analysis in the Oxide Scales Formed on 316L Stainless Steel at 700 °C under Humid Air’, Materials Research Proceedings, Vol. 6, pp 125-130, 2018


The article was published as article 20 of the book Residual Stresses 2018

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