From the isothermal transformation diagram, answer the following question. 800 Eutectoid temperature 1400 700 1200 600 a 1000 500 B Temperature (C) 800 Temperature (F) 400 300 600 M(start) 200 50% M + A 400 M(50%) M(90%) 100 200 0 10-1 1 10 102 103 104 105 The thermal treatment begins with: 1. a material that has been homogenized at 760 C 2. rapidly cooling to 680 C and holding for 100 seconds (at dotted line) 3. followed by rapidly cooling to 400 C and holding for 1000 seconds 4. then cooled to room temperature The final microstructure of this material is: [ Select] % [ Select] phase + [ Select] % [ Select] phase + [ Select ] phase Note that if you pick "0%", it should match with the "N/A" phase. The thermal treatment begins with: 1. a material that has been homogenized at 760 C 2. rapidly cooling to 680 C and holding for 100 seconds (at dotted line) 3. followed by rapidly cooling to 400 C and holding for 1000 seconds 4. then cooled to room temperature The final microstructure of this material is: [ Select ] % [ Select ] phase + % [Select ] phase + [ Select] 25 50 100 [ Select ] % [Select] phase Note that if you pick "0%", it should match with the "N/A" phase. O The thermal treatment begins with: 1. a material that has been homogenized at 760 C 2. rapidly cooling to 680 C and holding for 100 seconds (at dotted line) 3. followed by rapidly cooling to 400 C and holding for 1000 seconds 4. then cooled to room temperature The final microstructure of this material is: [ Select] % [Select ] phase + > phase + [ Select] [ Select] % coarse pearlite tempered martensite fine pearlite [ Select] % martensite spheroidite bainite Note that if you pick "O%", it should match with the "N/A" phase. > phase From the isothermal transformation diagram, answer the following question. 800 Eutectoid temperature 1400 700 1200 600 a 1000 500 B Temperature (C) 800 Temperature (F) 400 300 600 M(start) 200 50% M + A 400 M(50%) M(90%) 100 200 0 10-1 1 10 102 103 104 105 The thermal treatment begins with: 1. a material that has been homogenized at 760 C 2. rapidly cooling to 680 C and holding for 100 seconds (at dotted line) 3. followed by rapidly cooling to 400 C and holding for 1000 seconds 4. then cooled to room temperature The final microstructure of this material is: [ Select] % [ Select] phase + [ Select] % [ Select] phase + [ Select ] phase Note that if you pick "0%", it should match with the "N/A" phase. The thermal treatment begins with: 1. a material that has been homogenized at 760 C 2. rapidly cooling to 680 C and holding for 100 seconds (at dotted line) 3. followed by rapidly cooling to 400 C and holding for 1000 seconds 4. then cooled to room temperature The final microstructure of this material is: [ Select ] % [ Select ] phase + % [Select ] phase + [ Select] 25 50 100 [ Select ] % [Select] phase Note that if you pick "0%", it should match with the "N/A" phase. O The thermal treatment begins with: 1. a material that has been homogenized at 760 C 2. rapidly cooling to 680 C and holding for 100 seconds (at dotted line) 3. followed by rapidly cooling to 400 C and holding for 1000 seconds 4. then cooled to room temperature The final microstructure of this material is: [ Select] % [Select ] phase + > phase + [ Select] [ Select] % coarse pearlite tempered martensite fine pearlite [ Select] % martensite spheroidite bainite Note that if you pick "O%", it should match with the "N/A" phase. > phase