Using the isothermal transformation diagram for a 1.13 wt% C steel alloy (Figure 11.

Using the isothermal transformation diagram for a 1.13 wt% C steel alloy (Figure 11.49), determine the final microstructure (in terms of just the microconstituents present) of a small specimen that has been subjected to the following time–temperature treatments. In each case assume that the specimen begins at 920°C (1690°F) and that it has been held at this temperature long enough to have achieved a complete and homogeneous austenitic structure.