題組內容

4. For a eutectoid composition steel, the TTT diagram is shown schematically below
61c020eeba777.jpg61c0210aa09ca.jpg

(a) Refer to Fig. 8 above, and consider the three temperature histories shown. If you are trying to design a steel that best takes advantage of dislocation interactions with a second phase (i.e, strength controlled by bowing), which path is best and why? (10%)