Microstructure Evolution and Work Hardening Behavior of Hot-Rolled DP780 Ferrite/Bainite Dual-Phase Steel

Figure 5

TEM micrographs of experimental steels: (a) morphology of granular bainite in steel A as coiling temperature is 570°C; (b) morphology of precipitates in steel A as coiling temperature is 570°C; (c) chemical composition of precipitates in steel A as coiling temperature is 570°C; (d) fine VC precipitate in steel A as coiling temperature is 570°C; (e) fine precipitates on ferrite in steel A as coiling temperature is 570°C; and (f) chemical composition of precipitates in steel B as coiling temperature is 540°C.