A Dislocation-Based Theory for the Deformation Hardening Behavior of DP Steels: Impact of Martensite Content and Ferrite Grain Size

Table 3

Annealing conditions: soaking section (°C), tempering section (°C), temper rolling (% total strain), martensite fraction, martensite carbon content (wt%), and ferrite grain size [μm].

Grade	T (soaking)	T (temp.)	Temper rolling	Martensite fraction	Estimated martensite carbon content	d ferrite
DP500	760	300	0.6	0.13	0.60	10.8
DP600	760	300	0.6	0.18	0.60	8.4
DP800	760	300	<0.2	0.25	0.51	5.7
DP980	780	210	<0.2	0.48	0.31	3.8