Delamination Morphology Maps of Chromium Oxide Scales Formed on Cr-Based Alloys

Autor: Ph. Goudeau, Mathieu Guerain, Jean-Luc Grosseau-Poussard
Přispěvatelé: Unité Matériaux et Transformations - UMR 8207 (UMET), Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Centrale Lille Institut (CLIL), Surface, Interfaces et MAtériaux sous Contrainte SIMAC (SIMAC), Département Physique et Mécanique des Matériaux (Département Physique et Mécanique des Matériaux), Institut Pprime (PPRIME), Université de Poitiers-ENSMA-Centre National de la Recherche Scientifique (CNRS)-Université de Poitiers-ENSMA-Centre National de la Recherche Scientifique (CNRS)-Institut Pprime (PPRIME), Université de Poitiers-ENSMA-Centre National de la Recherche Scientifique (CNRS)-Université de Poitiers-ENSMA-Centre National de la Recherche Scientifique (CNRS), Laboratoire des Sciences de l'Ingénieur pour l'Environnement - UMR 7356 (LaSIE), La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS), Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)
Rok vydání: 2020
Předmět:
Materials science
[PHYS.MPHY]Physics [physics]/Mathematical Physics [math-ph]
0211 other engineering and technologies
Oxide
02 engineering and technology
01 natural sciences
Microscopic scale
[SPI.AUTO]Engineering Sciences [physics]/Automatic
Stress (mechanics)
chemistry.chemical_compound
[PHYS.QPHY]Physics [physics]/Quantum Physics [quant-ph]
Residual stress
0103 physical sciences
Stress relaxation
[PHYS.MECA.MEFL]Physics [physics]/Mechanics [physics]/Fluid mechanics [physics.class-ph]
[PHYS.MECA.BIOM]Physics [physics]/Mechanics [physics]/Biomechanics [physics.med-ph]
021102 mining & metallurgy
[SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph]
[PHYS.MECA.VIBR]Physics [physics]/Mechanics [physics]/Vibrations [physics.class-ph]
010302 applied physics
[SPI.FLUID]Engineering Sciences [physics]/Reactive fluid environment
[SPI.NRJ]Engineering Sciences [physics]/Electric power
Delamination
Metallurgy
Metals and Alloys
Fracture mechanics
[CHIM.MATE]Chemical Sciences/Material chemistry
[PHYS.MECA.MSMECA]Physics [physics]/Mechanics [physics]/Materials and structures in mechanics [physics.class-ph]
Condensed Matter Physics
Chromia
[PHYS.MECA.ACOU]Physics [physics]/Mechanics [physics]/Acoustics [physics.class-ph]
[SPI.ELEC]Engineering Sciences [physics]/Electromagnetism
[CHIM.POLY]Chemical Sciences/Polymers
chemistry
Mechanics of Materials
[PHYS.MECA.THER]Physics [physics]/Mechanics [physics]/Thermics [physics.class-ph]
Zdroj: Metallurgical and Materials Transactions A
Metallurgical and Materials Transactions A, Springer Verlag/ASM International, 2020, 51 (6), pp.2822-2833. ⟨10.1007/s11661-020-05750-z⟩
Metallurgical and Materials Transactions A, 2020, 51 (6), pp.2822-2833. ⟨10.1007/s11661-020-05750-z⟩
ISSN: 1543-1940
1073-5623
Popis: International audience; The delamination processes occurring in chromia scales formed on Ni-30Cr and Fe-47Cr alloys were studied. Delamination is the result of the competition between growth stresses evolution during heating, thermal stresses during cooling, and stress release phenomena, leading to high residual stress in the oxide film. Delamination in chromia has been found to occur due to type and amount of residual stresses generated at the end of heating-induced chromia growth and subsequent cooling-induced differential shrinkage. The mapping of the residual stresses in the oxide films at the microscopic scale around the delaminations allow to classify the latter into three different groups: buckles of Type 1, buckles of Type 2, and spalls. Using the stress relaxation magnitude, an assessment of the interfacial toughness of the metal/oxide systems was carried out, thanks to the buckling and crack propagation theory in the oxide. From the value obtained, microscopic observations, and the residual stress maps, a diagram describing the spalling of the buckles for chromia scales is proposed, as well as the delamination maps of Fe-47Cr/Cr2O3 and Ni-30Cr/Cr2O3 systems specifying the conditions of existence of the obtained delamination features.
Databáze: OpenAIRE
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