Compare the effectiveness of quenching in moderately agitated water and oil by graphing on a single plot radial hardness profiles for cylindri- cal specimens of an 8640 steel of diameter 75 mm (3 in.) that have been quenched in both media.

In your own words describe the following heat treatment procedures for steels and, for each, the intended final microstructure: full annealing, normalizing, quenching, and tempering.

Compare precipitation hardening (Section 11.9) and the hardening of steel by quenching and tempering (Sections \(10.5,10.6\), and \(10.8\) ) with regard to the following: (a) The total heat treatment procedure (b) The microstructures that develop (c) How the mechanical properties change during the several heat treatment stages