Ajustement De La Contrainte D’écoulement D’un Acier Microallie

An investigation has been carried out using a microalloyed steel from a hot compression tests. In Ihe first part of this work the rhéologic parameters such as strain rate sensitivity and the apparent activation energy were determinated using the slrain-deformation curves. It was found a spécific behaviour in ihe two phase range due to both grain size and dynamic recristallisation.
In the second part of this work the prédictions model of the flow stress are compared to expérimental results and are shown to be in good agreement with them.

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