Softening Behaviour after Deformation in the Austenite‐Ferrite Two‐Phase‐Region

Detailed knowledge of the material behaviour during austenite decomposition is of great importance for the development of new strategies in hot strip rolling, like direct and hot charging or ferritic rolling, as well as for the development of new steel grades. Especially the influence on flow curves, precipitation behaviour and microstructure in the hot strip is relevant. Two steels were investigated with regard to their softening behaviour in ferrite, ferriteaustenite and austenite region. An Avrami type modelling approach, based on the experimental softening results and the microstructural investigation was applied to model the softening in the two‐phase‐region. Thus the quantitative prediction of the softening can be found as a function of temperature, strain rate and interpass time.