Microstrain partitioning, Transformation Induced Plasticity, and the evolution of damage during deformation of an austenitic-martensitic 1.5 GPa Quench and Partition steel

The coupling of multiple advanced characterization techniques performed on a Fe-0.2C-3.4Mn-1.6Si, austenitic-martensitic, Quench and Partition steel (Q&P) with ultrahigh strength (∼1.5 GPa) microscopically explains its high true strain at fracture (ɛf) and superior toughness. The benefits of Transformation Induced Plasticity-assistance in Third Generation (3G) steel microstructures have been deduced by comparing the behavior of this Q&P steel …