The microstructure of martensite in austenite is shown in the micrograph. The black grains are the martensitic phase and the white the non-transformed austenite. The transformation does not involve ...

The micrographs below show the effect of annealing at different temperatures on a sample of Fe - 0.7 wt % C steel in which martensite has been formed by quenching. Because of the low carbon content ...