Advanced high-strength steels (AHSS) developed primarily for the automotive industry, meet many functional requirements such as strength, ductility, toughness and fatigue properties. However, the need for higher alloying elements to produce multiphase microstructures renders some of these steels susceptible to weld solidification cracking. Susceptibility to weld solidification cracking in dual phase (DP) and transformation induced plasticity (TRIP) steel sheet is studied using laser bead-on plate welding.
The objective of this project is to develop further understanding of solidification cracking phenomena and to predict cracking sensitivity
at the design stage of new steels.