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Publications déposées dans HAL depuis 2013

Autres publications

Articles scientifiques

Congrès - Conférences

Publications: Articles

Annees:

Toutes :: 2007, 2009

Auteurs:

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 :: Cailletaud, Chaffotte, Chambrier, Chateau, ... , Courleux

References

Articles:
2009
•	Longuet, A., Robert, Y., Aeby-Gautier, E., Appolaire, B., Mariage, J. F., Colin, C. and Cailletaud, G. A multiphase mechanical model for Ti-6Al-4V: Application to the modeling of laser assisted processing Computational Material Science, 46(3):761-766 2009 ISSN: 0927-0256 DOI: 10.1016/j.commatsci.2009.05.012 Resume: A multiphase model for Ti-6Al-4V is proposed. This material is widely used in industrial applications and so needs accurate behaviour modeling. Tests have been performed in the temperature range from 25 degrees C to 1020 degrees C and at strain rates between 10(-3) s(-1) and 1 s(-1). This allowed the identification of a multiphase mechanical model coupled with a metallurgical model. The behaviour of each phase is calibrated by solving an inverse problem including a phase transformation model and a mechanical model to simulate tests under thermomechanical loadings. A scale transition rule (beta-rule) is proposed in order to represent the redistribution of local stresses linked to the heterogeneity of plastic strain. Finally this model is applied to two laser assisted processes: direct laser fabrication and laser welding. (C) 2009 Elsevier B.V. All rights reserved. Equipe: Département SI2M : Microstructures et Contraintes
•	Ammar, Kais, Appolaire, Benoit, Cailletaud, Georges and Forest, Samuel Combining phase field approach and homogenization methods for modelling phase transformation in elastoplastic media European Journal of Computational Mechanics, 18(5-6):485-523 2009 ISSN: 1779-7179 DOI: 10.3166/ejcm.18.485-523 http://dx.doi.org/10.3166/ejcm.18.485-523 Equipe: Département SI2M : Microstructures et Contraintes
•	Ammar, Kais, Appolaire, Benoit, Cailletaud, Georges, Feyel, Frederic and Forest, Samuel Finite element formulation of a phase field model based on the concept of generalized stresses Computational Materials Science, 45(3):800-805 2009 ISSN: 0927-0256 DOI: 10.1016/j.commatsci.2008.09.015 http://dx.doi.org/10.1016/j.commatsci.2008.09.015 Equipe: Département SI2M : Microstructures et Contraintes
2007
Articles:
•	Teixeira, Julien Da Costa, Appolaire, Benoit, Aeby-Gautier, Elisabeth, Denis, Sabine, Cailletaud, Georges and Spath, Nadine Transformation kinetics and microstructures of Ti17 titanium alloy during continuous cooling MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 448(1-2):135-145 2007 ISSN: 0921-5093 DOI: 10.1016/j.msea.2006.10.024 Resume: We have investigated the microstructure evolutions in the Ti17 near beta titanium alloy during heat treatments. The phase transformation has first been studied experimentally by combining X-ray diffraction analysis, electrical resistivity and microscopy observations. From a series of isothermal treatments. a IT diauram has been determined, which takes into account the different morphologies. Then, a Johnson-Mehl-Avrami-Kolmogorov (JMAK) model has been successfully used to describe the phase transformation kinetics during either isothermal or cooling treatments. Finally, the coupling of the JMAK model to the finite element software ZeBuLoN allowed us to investigate the evolution of the spatial distribution of the different morphologies during the cooling of an aircraft engine shaft disk after forging. (c) 2006 Elsevier B.V. All rights reserved. Equipe: Département SI2M : Microstructures et Contraintes

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