Quantification of Critical Parameters for Prediction of Surface Crack Formation in Continuous Casting

One focus of the digitalization of the CC process is product quality prediction. The training of quality prediction modules can be achieved by experimental data. A requirement is the performance of experiments with samples simulating conditions close to the process. A challenging task is the forecast of surface cracks. At the Montanuniversitaet Leoben, a unique testing setup was developed, called the In- Situ Material Characterization by Bending (IMC-B) test. This test represents an experimental method, combining solidification, controlled cooling, and deformation in one sequence. It allows the prediction of surface crack formation with respect to the testing conditions. Varying testing parameters enable the determination of the impact of different factors that lead to crack formation during deformation of a casted sample in a 3-point bending test. As output quantification parameters for damage evaluation are provided by defining a critical strain for crack formation. This study shows the susceptibility to transverse crack formation of a low alloyed construction steel in the temperature range of the second ductility trough.