4. Behavior of multiphase steels

As we have just seen in 3 , current developments in steels with very high mechanical properties are largely open to multiphase microstructures. By modifying the chemical composition of alloys and, above all, the carbon content, it is possible to vary the nature of the phases, their morphology, distribution, volume fraction and composition, and consequently their mechanical behavior. It is therefore essential to be able to accurately predict the behavior of these alloys...