2. For the cooling curve below, mark on the diagram a heat treatment schedule (temperatures and times) that would produce a final alloy containing approximately 25% coarse pearlite, 25% fine pearlite, 25% bainite and 25% martensite. 800 A 1 Eutectoid temperature Aen A- Austenite (stable) 700 A 1200 600 Coarse pearlite RIC 15 P-Pearlite P Medium pearlite RIC 30 Fine pearlite RIC 40 Upper or feathery bainite RIC 40 1000 500 Nose Temperature (C) B B. Bainite Ending 800 Lower or acicular bainite R/C 60 600 400 Temperature (F) 300 Austenite (unstable) Beginning 400 Mg M(start) 200 50% 50% M+AM+ M50M(50%) Mgo M(90%) 100 M - Martensite RIC 64 200 0 10-4 1 10 102 103 104 105 Time (s) Isothermal - Transformation Diagram for a 1080 Eutectoid Steel