Figure5

Figure 5. Experimental results for logarithmic bainitic transformation time $$ \log_{10}(t_{\text{90%}}) $$, the martensite start temperature of the initial alloy $$ M_{\text{S}} $$ and the martensite start temperature of the retained austenite $$ M_{\text{S, RA}} $$. For $$ M_{\text{S, RA}} $$ under the detection limit of 50 ℃, it is drawn at 50 ℃. The combination of these measurements gives the process window for CFB steel, visualized with the green area. CFB: Carbide-free bainitic.