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Publications: Articles

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Hell, Jean-Christophe, Dehmas, Moukrane, Allain, Sebastien, Prado, Juscelino Mendes, Hazotte, Alain and Chateau, Jean-Philippe
ISIJ International, 51(10):1724-1732
ISSN: 0915-1559

Resume: We elaborated two carbide-free bainitic steels with different microstructures through specific alloy design and austempering process. Microstructural characterizations were performed by means of EBSD analysis and in-situ high energy synchrotron diffraction in order to evaluate the phase fractions and the carbon content in the retained austenite, as well as the microtextures. These microstructural features were correlated to the tensile properties. Both steels exhibited an excellent compromise between high strength (above 1 250 MPa), good ductility (uniform elongation up to 14%) and high fracture strain (reduction of area up to 46%). The volume fraction of MA blocks (blocks of retained austenite partially transformed into fresh martensite during the final cooling at room temperature) was a key relevant parameter that strongly influenced the work-hardening at the expense of the damaging processes at high strain.

Equipe: Département SI2M : Microstructures et Contraintes

Borgese, L., Bontempi, E., Gelfi, M., Depero, L. E., Goudeau, P., Geandier, G. and Thiaudière, D.
Acta Materialia, 59(7):2891-2900
ISSN: 1359-6454

Resume: Amorphous TiO2 thin films were deposited by means of atomic layer deposition on Kapton substrates and then crystallized ex situ by annealing at 300 degrees C to obtain the anatase phase. The morphology, structure and microstructure of films treated for 12, 24, 72 and 90 h were investigated. The local Ti coordination changes were studied by X-ray near-edge structure (XANES). On the basis of X-ray diffraction residual stress calculations, the elastic anisotropy of the films is experimentally determined for the first time (A*(comp) = 0.07, A*(shear) = 0.03). The film macro-strains increased with the time of treatment, while the micro-strains decreased. This effect may be correlated with the incipient anatase-to-rutile transformation as suggested by the changes observed in the XANES pattern of the film treated for 90 h. However, the contribution of the substrate cannot be excluded. (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

Equipe: Département SI2M : Microstructures et Contraintes

Di Napoli, P., Appolaire, B., Aeby-Gautier, E. and Bénéteau, A.
Solid State Phenomena, 172-174:1044-1049

Equipe: Département SI2M : Microstructures et Contraintes

Geochimica and Cosmochimica, 75:608-628

Equipe: Département CP2S : Surface et Interface, réactivité chimique des matériaux

Duguet, T., Unal, B., Ledieu, J., DUBOIS, J.-M., Fournee, V. and THIEL, P. A.
Phys. Rev. Lett, 106:076101
ISSN: 0031-9007

Equipe: Département CP2S : Métallurgie et Surfaces

Dufour, C., Fitzsimmons, M.R., Borchers, J.A., Laver, M., Krycka, K.L., Dumesnil, K., Watson, S.M., Chen, W.C., Won, J. and Singh, S.
Physical Review B - Condensed Matter and Materials Physics, 84(6)

Equipe: Département P2M : Nanomagnétisme et Electronique de Spin

Clement, F., Lecoq, E., Duday, D., Belmonte, T., Audinot, J-N., Lentzen, E., Penny, C., Cauchie, H-M. and Choquet, P.
New journal of physics, 13:113040

Equipe: Département CP2S : Expériences et Simulations des Plasmas Réactifs - Interaction plasma-surface et Traitement des Surfaces ESPRITS

Traore, Y., Legeai, S., Diliberto, S., Arrachart, G., Pellet-Rostaing, S. and Draye, M.
Electrochimica Acta, 58:532-540

Equipe: Département CP2S : Chimie et électrochimie des matériaux

Negulescu, B., Lacour, D., Hehn, M., Gerken, A., Paul, J. and Duret, C.
Journal of Applied Physics, 109(10)

Equipe: Département P2M : Nanomagnétisme et Electronique de Spin

Arnoult, G., Belmonte, T., Kosior, F., Dossot, M. and Henrion, G.
Journal of Physics D-Applied Physics, 44(17):174022

Equipe: Département CP2S : Expériences et Simulations des Plasmas Réactifs - Interaction plasma-surface et Traitement des Surfaces ESPRITS

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