Transformation kinetics of carbide-free bainitic steels during isothermal holding above and below MS

The transformation kinetics of a low carbon bainitic steel was investigated using in situ confocal microscopy and dilatometry for isothermal treatments above and below the martensite start (M S ) temperature. Both martensite and bainite are formed during isothermal holding below the MS, but bainite was the dominant transformation product. The prior martensite formed during cooling to the holding temperature strongly influenced the bainite …