Influence of cooling rate and initial surface roughness on the residual stresses in chromia scales thermally grown on pure chromium

Authors
Mougin, J Lucazeau, G Galerie, A Dupeux, M
Citation
J. Mougin et al., Influence of cooling rate and initial surface roughness on the residual stresses in chromia scales thermally grown on pure chromium, MAT SCI E A, 308(1-2), 2001, pp. 118-123
Citations number
24
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN journal
09215093 → ACNP
Volume
308
Issue
1-2
Year of publication
2001
Pages
118 - 123
Database
ISI
SICI code
0921-5093(20010630)308:1-2<118:IOCRAI>2.0.ZU;2-W
Abstract
Raman spectroscopy was used to determine the residual stresses in chromia s cales grown on purl chromium by thermal oxidation in dry oxygen. After oxid ation: these stresses are compressive and are shown to depend on both the c ooling rate and the initial surface roughness of the substrate. These param eters also have an influence on oxide spallation, but it is observed that t he relationship between stress level and spallation is not a direct one. A model is proposed to explain the tendency far chromia scales to spall, whic h considers the importance of initial surface roughness and oxide stresses. (C) 2001 Elsevier Science B.V. All rights reserved.