Texture evolution in thick plates of low carbon steels after rolling at high temperaturesWednesday (28.09.2016) 15:45 - 16:00 Part of:
Hot rolling is an essential part in manufacturing of flat products of low carbon steels, particularly for plates of 20 to 40 mm thickness. These hot deformations are usually carried on at fully austenitic state of the steel while the properties of the steel are mostly determined at low temperatures where the microstructure, depending on the cooling conditions could be ferrite, bainite and/or martensite. It is a challenging task to control the microstructure and the properties of the steel plates across the plate thickness. For instance, microstructure and texture which determine the plastic anisotropy of the materials are often heterogeneously distributed across the plate thickness due to variations in the temperature distribution and the strain distribution during rolling of thick plates. In this study, the texture evolution after hot rolling of two grades of low carbon steels is investigated. The textures before and after hot rolling are measured by “wide-field” EBSD technique. The formation of the austenite texture during deformation is simulated by coupling models of visco-plasticity self-consistent (VPSC) and finite element (FE) codes. Reconstructions of austenite textures from measured textures with the best-fitted orientation relationship for each individual case are implemented. Comparisons between simulated and reconstructed textures reveal the link between process parameters and material properties.