HW#1 Upload your submissions on canvas by 1/25 UNF UNIVERSITY NORTH FLORIDA Given: A 1-kg, AISI 1070 high-carbon steel is being cooled slowly to the following temperatures (a) 800 °C; (b) 728 °C; and (c) 726 °C Find: Determine the amount of gamma, alpha and cementite phases in the steel. UNF College of Computing Ingegne C 1600 1538°C 8 (Ferrite)- 1495°C 1400 1394°C y+liquid 900 Temperature (°C) 1200 1148°C y (austenite), 2.11% 4.30% 2000 1000 912°C y+ cementite a+y Detail view 1500 800 727°C Temperature (°C) 1100 Liquid 1000- 2500 y + FeC 1500 F 2000 600 0.77% 0.022% a (ferrite) 800 a+y 727°C 700 a 600 Ferrite a+cementite -Fe,C 1000 1000 Cementite (Fe,C). 500 α + Fe₁₂C 400 1 0 1 2 3 4 5 6 6.67 4000 0.5 1.0 1.5 2.0 2.5 Carbon (% by weight) Carbon (% by weight) (a) (b)

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