2014 | |
Articles: | |
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Journal of heat treatments and materials,
69:54--59
2014
DOI: 10.3139/105.110206
Equipe: Département SI2M : Microstructures et Contraintes |
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Acta Materialia,
80:118--131
2014
ISSN: 1359-6454
Equipe: Département SI2M : Microstructures et Contraintes |
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Investigation of the growth kinetics of gamma -> alpha in Fe-C-X alloys with a thick interface model
Computational Materials Science,
82:151-158
2014
Equipe: Département SI2M : Microstructures et Contraintes |
2013 | |
Articles: | |
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Materials Science Forum,
768-769:313-320
2013
Equipe: Département SI2M : Microstructures et Contraintes |
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Key Engineering Materials,
554--557:1530--1538
2013
Equipe: Département SI2M : Microstructures et Contraintes |
2012 | |
Articles: | |
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Computational Material Science,
61:54--66
2012
Equipe: Département SI2M : Microstructures et Contraintes |
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Key Engineering Materials,
504-506:1049-1054
2012
Equipe: Département SI2M : Microstructures et Contraintes |
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Micron,
43(2-3):396-406
2012
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 |
2011 | |
Articles: | |
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Solid State Phenomena,
172-174(Part 1):1214-1219
2011
ISSN: 1012-0394
Resume: We have adapted the Quickhull algorithm with the general dimension Beneath-Beyond algorithm [6] for computing the convex hull of the Gibbs energy hypersurface of multicomponent two-phase alloys. We illustrate the salient features of our method with calculations of isothermal ferrite-austenite equilibria in Fe-C-Cr. Finally, successive equilibrium calculations in a Fe-C-Cr-Mo steel over a large temperature range show the benefit of computing the convex hull before performing the conventional Newton-Raphson search. Equipe: Département SI2M : Microstructures et Contraintes |
2010 | |
Articles: | |
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Philisophical magazine,
90(1-4):461-483
2010
ISSN: 1478-6435
Resume: We propose a description of incoherent and semi-coherent interfaces within the framework of diffuse interface modelling: accounting for the discontinuity of tangential displacements is an issue addressed by introducing a new field, called the incoherency field, located in the diffuse interface and able to release the shear stresses tangential to the interface. After having demonstrated the ability of the model to recover trends obtained by sharp interface models of sliding interfaces, the process of loss of coherency is investigated by assuming a local process which would result from the competition between the shear stress release at the interface and the interfacial energy increase. Equipe: Département SI2M : Microstructures et Contraintes |