Constitutive equations of the hot flow behaviour of microalloyed steels
Keywords:Constitutive equations, Steels, Hot working
Over centuries, the hot forming has been employed to provide shape to metáis. Nowadays, the deformation at high temperatures gives also the required final mechanical properties. From this point of view, the obtention of a constitutive equation describing the hot flow behaviour of microalloyed steels in particular is a very important task. The main difficulty in modelling the high temperature flow arises from the simultaneity of two opposite phenomena, namely, work hardening and dynamic softening due to recovery and recrystallization. In this is work a review of constitutive equations (including the effect of the chemical composition) describing the flow behaviour of microalloyed steels deformed under high temperature conditions.
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