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(Solved): Using the TTT diagrams shown in Figures 3 and 4, determine the grain structure that is present when ...
Using the TTT diagrams shown in Figures 3 and 4, determine the grain structure that is present when a 100% austenitic structure at 750°C is: a. Cooled rapidly to 400°C, held for 2 s, then quenched to room temperature. b. Cooled rapidly to 400°C, held for 20 s, then quenched to room temperature. c. Cooled rapidly to 700°C, held for 10,000 s, then quenched to room temperature
Figure 3: TTT diagram for 1080 Steel (Ref, OSU website)
Figure 4: TTT diagram for Steel (Ref, VT website)
Expert Answer
a. Cooled rapidly to 400°C, he