1700 1600 (1534) (1493) 1500 Liquid (L) 1400 (1390") 1300 1200 1100 Fe3C + L (1147) γ-Fe (Austenite) 아ㅡㅡ 1000 900 (910) 800 α + Fe3C (cementite) (Ferrite) 600 500 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 Fe Weight percentage ofC FIGURE 5.13 The phase diagram of the iron-carbon system. The diagram is shown only up to 6.67% carbon, which corresponds to the compound Fe,C.All colored areas are two-phase regions.
800 700 600 こ50아 F+C 5°C/s 400 40°C/s \ 、 、 300 140°C/s 200 Pearlite 10아 Fine pearlite Coarse pearlite Martensite Martensite 104 105 108 10 10104 0.1 10 Time (s) ■FIGURE 6.7 TTT (segmented) and CCT (shaded) curves for eutectoid steel.
Homework Answers
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6.8. The heat treatments noted below are carried out in 1080 steel. In each case what phases will...
Describe the heat treatment scheume that would provide the following property changes to 1080 steel. Refer...
Describe the heat treatment scheume that would provide the
following property changes to 1080 steel. Refer to TTT diagram
below.
a) 100% pearlite to a miture of 50% pearlite and 50%
martensite
b) Mixture of 75% pearlite and 25% martensite to 100%
martensite
800 1400 Eutectoid temperature 700 1200 600 1000 500 800 400 600 300 M(start) M(50%) M(90%) 50% 400 200 M + A 100 200 0 10-1 102 Time (s) 10 103 10 10
Round to the nearest 5%--no need for something like 43.2...that would become 45. If there's none of that phase form...
Round to the nearest 5%--no need for something like 43.2...that
would become 45. If there's none of that phase formed, enter a 0
(zero). If it looks close enough then it is
800 1400 Eutectoid temperature 700 1200 1000 500 800 400 600 300 M(start) 200 400 M + A M( 5096) M19096) 100 10 102 03 104105 Time (s) Using the above TTT diagram for the eutectoid composition of steel, enter the relative amount of each microstructure formed for...
A carbon steel plate containing 0.33 wt%C is heat treated to 1000°C so you will need to evaluate the following queries: A. With consideration of the equilibrated structures, estimate the phases f...
A carbon steel plate containing 0.33 wt%C is heat treated to 1000°C so you will need to evaluate the following queries: A. With consideration of the equilibrated structures, estimate the phases formed upon cooling to room temperature You determine later that the steel's composition is Fe-0.33C-0.53Mn-0.9Cr-0.18Mo (all in wt%), and luckily found the attached diagram. Give the processing of the steel needed to acquire a microstructure of austenite, 50% pearlite, 100% martensite, and 100% bainite Determine the mole fraction of...
Q2 What are the phases present at room temperature for steel of 0.76% C? Determine the...
Q2 What are the phases present at room temperature for steel of 0.76% C? Determine the composition & amounts of ferrite (a) and cementite (Fe3C) at room temperature in pearlite of eutectoid composition (0.76%C). Use attached Fe-Fe3C phase diagram or Fig. 9.24 in your text book. Composition (at% C) 10 25 1538°C TT - 1493°C 14008 1394°C 1147°C 4.30 y Austenite Temperature (°C) 1000 912°C y + Fezc 800 727°C 0.76 brol 600 0.022 a, Ferrite a + Fea Cementite...
Austenite Pearlite Question 3 (24 pts): We are interested in performing different heat treatments to an...
Austenite Pearlite Question 3 (24 pts): We are interested in performing different heat treatments to an iron-carbon alloy of eutectoid compostion. Use the provided Temperature-Time Transformation (TTT) and Continuous Cooling Transformation (CCT) diagrams to specify the nature of the final microstructure in terms of microconstituents present and approximate percentages) of a small specimen that has been subjected to the following heat treatments. In each case, assume that the specimen begins at 760°C and that it has been at this temperature...
5. Using the attached ITT diagram for 1.13 wt% C steel, name the structures present and...
5. Using the attached ITT diagram for 1.13 wt% C steel, name the structures present and approximate quantities after the following heat treatments: a) heat to 900°C, quench to 700°C, hold for 10 s, quench to 0°C (the iron-iron carbide phase diagram will help) b) heat to 900°C, quench to 300°C, hold for 1000 s, quench to 0°C c) heat to 900°C, quench to 100°C d) heat to 800°C, quench to 0°C (the iron-iron carbide phase diagram will help) 404...
Using the attached TTT diagram for 1.13 wt% C steel, name the structures present and approximate...
Using the attached TTT diagram for 1.13 wt% C steel, name the structures present and approximate quantities after the following heat treatments: a) heat to 900°C, quench to 700°C, hold for 10 s, quench to 0°C (the iron-iron carbide phase diagram will help) b) heat to 900°C, quench to 300°C, hold for 1000 s, quench to 0°C c) heat to 900°C, quench to 100°C d) heat to 800°C, quench to 0°C (the iron-iron carbide phase diagram will help) 900 1600...
900 1600 A A+C 404 • Chapter 10 Phase Transformations Figure 10.39 Isothermal transformation diagram for...
900 1600 A A+C 404 • Chapter 10 Phase Transformations Figure 10.39 Isothermal transformation diagram for a 1.13 wt% Ciron-carbon alloy: A, austenite; B, bainite; C, proeutectoid ce 800 mentite; M, martensite; P.pearlite. [Adapted from H. Boyer (Editor), Atlas of Isother- mal Transformation and Cooling Transformation Diagrams, 1977. Reproduced by permission of ASM International, Materials Park, OH.) ? 1400 200 A+P 1200 600 1000 500 A+B Temperature (°C) 800 Temperature (°F) 400 A 300 600 50% 200 M(start) 400 M(50%)...
800 A 1400 Eutectoid temperature 700 A 1200 P 600 1000 500 A 800 400 A 600 300 M(start) 50% 400 200 M+ A M(50%) M(...
800 A 1400 Eutectoid temperature 700 A 1200 P 600 1000 500 A 800 400 A 600 300 M(start) 50% 400 200 M+ A M(50%) M(90%) 100 200 105 102 103 104 10-1 10 1 Time (s) Temperature (°C) Temperature (°F) Using the above TTT diagram for the eutectoid composition of steel, enter the relative amount of each microstructure formed for the following heat treatment in the boxes below. Rapidly cool to 625°C, hold for 10s, rapidly cool to 450°C,...
phase dtransformation diagram and heat treatment. Can you answer parts a b and c please. need...
phase dtransformation diagram and heat
treatment.
Can you answer parts a b and c please. need it done in
the next 30 mins
1: Using the phase transformation diagram below, describe heat treatment procedures to produce the following from eutectoid steel at 750°C 800 1400 А Eutectoid temperature 700 A 1200 P 600 1000 N 500 -- Temperature (°C) Temperature (°F) @ B 800 400 A 600 300 50% 400 200 100 104 10-1 105 1 103 10 102 Time...
Describe the heat treatment scheume that would provide the
following property changes to 1080 steel. Refer to TTT diagram
below.
a) 100% pearlite to a miture of 50% pearlite and 50%
martensite
b) Mixture of 75% pearlite and 25% martensite to 100%
martensite
800 1400 Eutectoid temperature 700 1200 600 1000 500 800 400 600 300 M(start) M(50%) M(90%) 50% 400 200 M + A 100 200 0 10-1 102 Time (s) 10 103 10 10
Round to the nearest 5%--no need for something like 43.2...that
would become 45. If there's none of that phase formed, enter a 0
(zero). If it looks close enough then it is
800 1400 Eutectoid temperature 700 1200 1000 500 800 400 600 300 M(start) 200 400 M + A M( 5096) M19096) 100 10 102 03 104105 Time (s) Using the above TTT diagram for the eutectoid composition of steel, enter the relative amount of each microstructure formed for...
A carbon steel plate containing 0.33 wt%C is heat treated to 1000°C so you will need to evaluate the following queries: A. With consideration of the equilibrated structures, estimate the phases formed upon cooling to room temperature You determine later that the steel's composition is Fe-0.33C-0.53Mn-0.9Cr-0.18Mo (all in wt%), and luckily found the attached diagram. Give the processing of the steel needed to acquire a microstructure of austenite, 50% pearlite, 100% martensite, and 100% bainite Determine the mole fraction of...
Q2 What are the phases present at room temperature for steel of 0.76% C? Determine the composition & amounts of ferrite (a) and cementite (Fe3C) at room temperature in pearlite of eutectoid composition (0.76%C). Use attached Fe-Fe3C phase diagram or Fig. 9.24 in your text book. Composition (at% C) 10 25 1538°C TT - 1493°C 14008 1394°C 1147°C 4.30 y Austenite Temperature (°C) 1000 912°C y + Fezc 800 727°C 0.76 brol 600 0.022 a, Ferrite a + Fea Cementite...
Austenite Pearlite Question 3 (24 pts): We are interested in performing different heat treatments to an iron-carbon alloy of eutectoid compostion. Use the provided Temperature-Time Transformation (TTT) and Continuous Cooling Transformation (CCT) diagrams to specify the nature of the final microstructure in terms of microconstituents present and approximate percentages) of a small specimen that has been subjected to the following heat treatments. In each case, assume that the specimen begins at 760°C and that it has been at this temperature...
5. Using the attached ITT diagram for 1.13 wt% C steel, name the structures present and approximate quantities after the following heat treatments: a) heat to 900°C, quench to 700°C, hold for 10 s, quench to 0°C (the iron-iron carbide phase diagram will help) b) heat to 900°C, quench to 300°C, hold for 1000 s, quench to 0°C c) heat to 900°C, quench to 100°C d) heat to 800°C, quench to 0°C (the iron-iron carbide phase diagram will help) 404...
Using the attached TTT diagram for 1.13 wt% C steel, name the structures present and approximate quantities after the following heat treatments: a) heat to 900°C, quench to 700°C, hold for 10 s, quench to 0°C (the iron-iron carbide phase diagram will help) b) heat to 900°C, quench to 300°C, hold for 1000 s, quench to 0°C c) heat to 900°C, quench to 100°C d) heat to 800°C, quench to 0°C (the iron-iron carbide phase diagram will help) 900 1600...
900 1600 A A+C 404 • Chapter 10 Phase Transformations Figure 10.39 Isothermal transformation diagram for a 1.13 wt% Ciron-carbon alloy: A, austenite; B, bainite; C, proeutectoid ce 800 mentite; M, martensite; P.pearlite. [Adapted from H. Boyer (Editor), Atlas of Isother- mal Transformation and Cooling Transformation Diagrams, 1977. Reproduced by permission of ASM International, Materials Park, OH.) ? 1400 200 A+P 1200 600 1000 500 A+B Temperature (°C) 800 Temperature (°F) 400 A 300 600 50% 200 M(start) 400 M(50%)...
800 A 1400 Eutectoid temperature 700 A 1200 P 600 1000 500 A 800 400 A 600 300 M(start) 50% 400 200 M+ A M(50%) M(90%) 100 200 105 102 103 104 10-1 10 1 Time (s) Temperature (°C) Temperature (°F) Using the above TTT diagram for the eutectoid composition of steel, enter the relative amount of each microstructure formed for the following heat treatment in the boxes below. Rapidly cool to 625°C, hold for 10s, rapidly cool to 450°C,...
phase dtransformation diagram and heat
treatment.
Can you answer parts a b and c please. need it done in
the next 30 mins
1: Using the phase transformation diagram below, describe heat treatment procedures to produce the following from eutectoid steel at 750°C 800 1400 А Eutectoid temperature 700 A 1200 P 600 1000 N 500 -- Temperature (°C) Temperature (°F) @ B 800 400 A 600 300 50% 400 200 100 104 10-1 105 1 103 10 102 Time...
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