Etude du laminage à froid d'alliages de titane : mécanismes de déformation et évolutions de texture

Abstract : The aim of this work is to understand the deformation mechanisms for the study and the modelisation of cold rolling textures of titanium alloys. In this study, we use the Taylor model to simulate cold rolling textures. Modelling requires a good knoledge of metallurgical parameters leading to the texture evolution during deformation. We thus studied the evolution of the grain morphology and the twinned volume fraction with rolling. We have also determined the different deformation modes, either by TEM, or by individual orientation measurements (EBSD) for determining the type of the twins. The Taylor model is used in its two versions, the Full Constrained, respectively Relaxed Constrained Version. The use of the one or the other of these two versions relies on the knowledge of the grains' morphology. The modelled textures are in good agreement with the experimental ones. A comparison with the results of other models seems to be in favour of the Taylor model including the Monte Carlo scheme to account for twinning. This model, in addition to the good simulations also allows the description of the twinned volume fraction, what is not the case for other models
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Mohamed Serghat. Etude du laminage à froid d'alliages de titane : mécanismes de déformation et évolutions de texture. Autre. Université Paul Verlaine - Metz, 1994. Français. ⟨NNT : 1994METZ069S⟩. ⟨tel-01776862⟩

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