A multiphase mechanical model for Ti-6Al-4V: Application to the modeling of laser assisted processing

This file was created by the TYPO3 extension bib --- Timezone: CET Creation date: 2021-03-07 Creation time: 07-35-46 --- Number of references 4 article Longuet:2009 A multiphase mechanical model for Ti-6Al-4V: Application to the modeling of laser assisted processing Computational Material Science 2009 46 3 761-766 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. Département SI2M : Microstructures et Contraintes Chinese Soc Theoret & Appl Mech 0927-0256 10.1016/j.commatsci.2009.05.012 A.Longuet Y.Robert E.Aeby-Gautier B.Appolaire J. F.Mariage C.Colin G.Cailletaud article Ammar:2009a Combining phase field approach and homogenization methods for modelling phase transformation in elastoplastic media European Journal of Computational Mechanics 2009 18 5-6 485-523 Département SI2M : Microstructures et Contraintes http://dx.doi.org/10.3166/ejcm.18.485-523 Lavoisier 1779-7179 10.3166/ejcm.18.485-523 KaisAmmar BenoitAppolaire GeorgesCailletaud SamuelForest article Ammar:2009 Finite element formulation of a phase field model based on the concept of generalized stresses Computational Materials Science 2009 45 3 800-805 Département SI2M : Microstructures et Contraintes http://dx.doi.org/10.1016/j.commatsci.2008.09.015 Elsevier BV 0927-0256 10.1016/j.commatsci.2008.09.015 KaisAmmar BenoitAppolaire GeorgesCailletaud FredericFeyel SamuelForest article Teixeira:2007 Transformation kinetics and microstructures of Ti17 titanium alloy during continuous cooling MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 2007 448 1-2 135-145 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. Département SI2M : Microstructures et Contraintes 0921-5093 10.1016/j.msea.2006.10.024 Julien Da CostaTeixeira BenoitAppolaire ElisabethAeby-Gautier SabineDenis GeorgesCailletaud NadineSpath