Effect of matrix structures on TRIP effect and mechanical properties of low-C low-Si Al-added hot-rolled TRIP steels

We applied different hot-rolling direct quenching and partitioning (HDQ&P) processes to a low-C low-Si Al-added steel and obtained eight TRIP-assisted steels with different matrix structures, viz, martensite, ferrite/bainite, ferrite/martensite and ferrite/bainite/martensite. The microstructures were characterized using SEM, TEM and XRD. The mechanical properties were investigated by means of uniaxial tensile tests. Quasi in-situ tensile tests...