Motivation and goals:
In the sheet metal forming process for steel, cooling rate plays an important role in the final microstructure. Typically, steel is heated above the upper critical temperature to form Austenite (crystal structure changes to face centered cubic) and subsequently cooled:
- Slow cooling leading to formation of soft phase Pearlite (Ferrite+Cementite)
- Rapid cooling (Quenching) leading to the formation of hard phase Martensite (Body Centered Tetragonal)
In the project B8, we have the following research objectives: Development of a phase-field model for phase transformation in steel depending on the cooling rate. We aim to consider both (a) Austenite to Pearlite, Bainite and (b) Austenite to Martensite transitions.