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Publications: Articles

Toutes :: 2007, 2008, 2009, 2011, 2012
Tous :: A, B, C, D, E, F, G, H, I, J, K, L, M, N, P, R, S, T, V, W, X, Y, Z 
Tous :: Hazotte, ... , Hericher, Hill, Horwat, ... , Hutchinson 
References par page: Mots clefs Voir les resumes


Brunetti, G., Settefrati, A., Hazotte, A., Denis, S., Fundenberger, J. -J., Tidu, A. and Bouzy, E.
Micron, 43(2-3):396-406
ISSN: 0968-4328

Resume: In single-crystal nickel-based superalloys, the lattice mismatch associated with interface coherency between gamma matrix and gamma' precipitates has a strong influence on mechanical properties. The unconstrained lattice misfit in a single-crystal of the MC2 nickel-based superalloy is determined using convergent beam electron diffraction measurements and finite element calculations. The apparent lattice parameters of both constrained phases are obtained in thin foils, using a new multi-pattern approach, which allows for unambiguous determination of all the lattice parameters considering the real symmetry of the strained crystals. Finite element calculations are used to establish relations between the constrained and unconstrained lattice parameters, with the stress relaxation resulting from the thin foil geometry taken into account. (C) 2011 Elsevier Ltd. All rights reserved.

Equipe: Département SI2M : Microstructures et Contraintes

Horwat, D., Dehmas, M., GUTIERREZ, A., Pierson, J.F., Anders, A., SOLDERA, F. and Endrino, J.L.
Chemistry of materials, 24 (3):2429-2432

Equipe: Département SI2M : Microstructures et Contraintes

Horwat, D., JIMENEZ-PIQUE, E., Pierson, J. F., Migot, S., Dehmas, M. and Anglada, M.
Journal of Physics and Chemistry of solids, 73(4):554-558
ISSN: 0022-3697

Resume: Zr1-xWx nanocrystalline films of Zr-W solid solutions and ZrW2 Laves phase were synthesized by magnetron co-sputtering. Large values of the H/E ratio up to 0.09 are observed for grain sizes in the nanometer range along with a hardness above 10 GPa and Young's modulus below 230 GPa. H/E values are correlated with the developed surface of grain boundaries suggesting an elastic deformation mostly handled by the grain boundaries. This is associated to friction coefficients comparable to those of metallic glass surfaces. In contrast to fragile bulk Laves phases, no cracks were detected at the film surface after indentation and scratch test of nanocrystalline ZrW2. The friction coefficient of such films against diamond tip was in the range 0.08-0.15, similarly to metallic glass surfaces. (C) 2011 Elsevier Ltd. All rights reserved.

Equipe: Département SI2M : Microstructures et Contraintes

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