PREDCRACK - Predictive model of risk for hot cracks in welds in high strenght steel
Purpose and goal
The purpose of the project was to develop and evaluate a FE-model for prediction of the hot crack-susceptibility of MAG-welded T-joints. The aim of the project is considered to be achieved since the results from the simulations show a possibility to use the evaluated model in order to compare and evaluate the crack susceptibility in different joints with different joint preparations.
Expected results and effects
The results show that it is possible to use FE-simulations in order to predict the risk for hot cracks and use the model for joint preparation optimization. Hereby it is considered that there are highly likely that the results from the project can be used in order to decrease the risk for hot cracks in industrial applications in the future. However, for implementation further evaluation is needed. For example evaluation of entire components and optimization of post-processing.
Planned approach and implementation
A previous project at Swerea KIMAB, where hot crack-susceptibility for different base- and filler materials and different gap widths were evaluated, were used as the base for the experiments in this project. The results from the physical experiments have been compared to the results from the simulations in order to investigate if it is possible to use the model for prediction of cracks which were found from the physical experiments. A number of industrial cases have also been evaluated in this project.