Measurement of Stress in Phosphated-Iron Oxide Layers by In-Situ Diffraction of Synchrotron Radiation

Panicaud, Benoît; Renault, P.; Grosseau-Poussard, Jean-Luc; Dinhut, J.F.; Thiaudière, Dominique; Gailhanou, M.

doi:10.4028/www.scientific.net/msf.404-407.809

Cited by 3 publications

(4 citation statements)

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“…The magnetite in all of the 5 investigated samples contains compressive in-plane residual stresses. The magnitude of the average residual stresses in the 966 Residual Stresses VII, ECRS7 magnetite of the oxide layers, regarding the experimental error margin, is almost the same and agrees well with earlier measurements [10,13]. A relation between substrate roughness and compressive residual stress in the magnetite is not obvious.…”

Section: Resultssupporting

confidence: 89%

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Dependence of Oxidation Behavior and Residual Stresses in Oxide Layers on Armco Iron Substrate Surface Condition

Juricic

Pinto

Wróblewski

et al. 2006

MSF

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Mass gain during oxidation, texture and residual stresses in oxide layers on polycrystalline Armco iron substrates with different surface conditions are investigated using thermogravimetry microscopy and synchrotron X-rays. The mass gain during oxidation in all samples follows a parabolic law. The parabolic oxidation constant increases with increasing roughness of a mechanically ground respectively polished oxide layer. Electrolytic polishing (grain surface etching) reduces while grain boundary etching increases the parabolic oxidation constant compared to the mechanically polished sample. All oxide layers show columnar growth of the magnetite and a moderate fiber texture. The magnetite contains compressive residual stresses. Under the conditions chosen for the oxidation treatment the magnitude of these compressive residual stresses does not depend on the substrate surface condition.

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Section: Resultssupporting

confidence: 89%

“…Texture of the MagnetiteResidual Stresses. Measurements of the average residual stresses in magnetite using the sin 2 ψmethod revealed linear sin 2 ψ curves without ψ splitting, which is in agreement with earlier observations [e.g 10,12,13]…”

supporting

confidence: 92%

Dependence of Oxidation Behavior and Residual Stresses in Oxide Layers on Armco Iron Substrate Surface Condition

Juricic

Pinto

Wróblewski

et al. 2006

MSF

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“…Experimental stress analyses by [18] in the early stage of the scale formation on a-Fe reveal cooling stresses of approximately À 260 MPa in the a-Fe 2 O 3 and approximately À 170 MPa in the Fe 3 O 4 . This agrees well with stress values obtained from the straight forward calculation using the elastic modulus value given in [57] for compact a-Fe 2 O 3 and in [58] for FeO, which yields À 50 MPa in the FeO and À 280 MPa in the a-Fe 2 O 3 .…”

Section: Residual Stresses After Coolingmentioning

confidence: 99%

In‐situ stress analyses during high temperature oxidation of mild steel and grey cast iron

Corkovic

Pyzalla²

2004

Materials & Corrosion

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For a protective effect of oxide layers their density and their adherence to the substrate are essential. These are determined by the phase composition, the morphology and the strains in the substrate and the oxide layer. In order to determine the development of the phase composition and the strain in oxide layers in-situ X-ray investigations are performed. In addition to the in-situ experiments the layer composition, morphology and texture are investigated ex-situ after the oxidation process. The results of the experiments on a mild steel and grey cast iron reveal that the oxide layers develop fibre textures. Epitaxial strains influence the growth strains in the oxide layers. The strains and stresses present in the oxide layers after cooling to room temperature are dominated by the strain development caused by the misfit in the thermal expansion coefficient of the substrate and the different oxide sub-layers.

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“…Time-resolved X-ray diffraction measurements (millisecond measurement time) will make the investigation of fast kinetics possible, for instance phase transitions or self-propagating high temperature synthesis [28]. The study of thin films and interfaces, in particular to determine their mechanical properties (strain measurements and stress determination), will be an important application field of the DiffAbs beamline [29,30].…”

Section: Coupled Absorption-diffractionmentioning

confidence: 99%

Soleil a New Powerful Tool for Materials Science

Baudelet

Belkhou

Briois

et al. 2005

Oil & Gas Science and Technology - Rev. IFP

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Résumé -SOLEIL, un nouvel outil puissant pour les sciences des matériaux -À l'aube des premiers photons disponibles sur l'anneau synchrotron de troisième génération SOLEIL, un état des possibilités offertes en sciences des matériaux sera présenté. La brillance exceptionnelle de cette machine permettra de réduire de plusieurs ordres de grandeur les temps d'acquisition typiques des différentes techniques synchrotrons (spectroscopie d'absorption-EXAFS, diffusion X aux petits et grands angles-SAXS et WAXS, diffraction des rayons X -XRD, spectroscopies et microscopie de photoélectrons -XPS et PEEM, etc.) les transformant en véritables techniques operando pour la caractérisation des matériaux et plus particulièrement des catalyseurs. La résolution spatiale à l'échelle de quelques microns et même submicronique, accessible par microdiffraction et microspectroscopie dans un domaine s'étendant de l'IR lointain aux X durs, pourra être mise à profit pour réaliser une cartographie atomiquement sélective de matériaux, du catalyseur hétérogène en action aux roches réservoirs. Un ensemble de techniques in situ permettra d'accéder à la réactivité de surfaces et de nanoparticules exposées à des flux gazeux contrôlés. La combinaison des techniques synchrotrons (diffraction, absorption et fluorescence X, etc.) ou l'apport d'informations complémentaires par combinaison simultanée de techniques classiques (Raman, UV-Vis, etc.) avec les techniques du synchrotron seront enfin un atout majeur pour la caractérisation operando des matériaux.Abstract -SOLEIL a New Powerful Tool for Materials Science -The first photons delivered by the third generation synchrotron source SOLEIL will be soon available for the scientific community. In this context, this paper presents an overview of the potentialities offered by this new machine for the study of materials. The outstanding brilliance of the SOLEIL source will enable to reduce by several orders of magnitude the data collection time for most of the synchrotron techniques (X-ray absorption spectroscopy -EXAFS, wide and small angle X-ray scattering -WAXS and SAXS, X-ray diffraction -XRD, photoelectron spectroscopy and microscopy-XPS and PEEM, etc.)

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Measurement of Stress in Phosphated-Iron Oxide Layers by In-Situ Diffraction of Synchrotron Radiation

Cited by 3 publications

References 0 publications

Dependence of Oxidation Behavior and Residual Stresses in Oxide Layers on Armco Iron Substrate Surface Condition

Dependence of Oxidation Behavior and Residual Stresses in Oxide Layers on Armco Iron Substrate Surface Condition

In‐situ stress analyses during high temperature oxidation of mild steel and grey cast iron

Soleil a New Powerful Tool for Materials Science

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