Homework Answers
Eutectoid temperature in the phase diagram is 727 oC.
Eutectic wt% of C in the phase diagram is 4.3 %
Eutectoid wt% of C in the phase diagram is 0.76 %
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You were hired to help make prop in a TV series, the Game of Thrones. One...
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...
PROBLEM 11 (10 pts) Consider the phase diagram shown below. Be precise when you read the...
PROBLEM 11 (10 pts) Consider the phase diagram shown below. Be precise when you read the phase diagram. (a) (5 pts) Consider Fe - 1.9 wt% C steel at a temperature just below the eutectoid temperature. Determine the relative amount of the pearlite. Write the Lever rule expression used clearly. (b) (5 pts) Consider Fe - 0.6 wt% C steel at a temperature just below the eutectoid temperature. Determine the relative amount of the pearlite. Write the Lever rule expression...
Consider the Fe-Fe3C phase diagram and answer the following questions: 21. At a temperature just below...
Consider the Fe-Fe3C phase diagram and answer the following questions: 21. At a temperature just below the eutectic (1147°C) for a sample with 4 wt% C please calculate the mass fraction of (a) primary Y (austenite), (b) eutectic y (austenite), and for a sample with 5 wt% C please calculate the mass fraction of (c) primary Fe,c (cementite), (d) eutectic Fe C (cementite). (8%) 22. At a temperature just up the eutectic (1147°C), at first for a sample with 4...
Question 3 (1) Sketch the microstructures (at temperature just below eutectold temperature) of slow-cooled pure Iron...
Question 3 (1) Sketch the microstructures (at temperature just below eutectold temperature) of slow-cooled pure Iron (Owt%C) and steels with 0.3wt%C, and 0.76wt%C, and explain how the structures develop on cooling from 1100°C to room temperature (Figure 3.1 for Fe-Fe,c phase diagram, see below). (18marks] 1600 Composition Cat C) 10 is 20 25 1538"C 149346 1400 1394°C 2500 72 1200 1147°C > Austenite 2.14 4.30 Temperature) 2000 1000 Temperature (°F) 912°C y + Fe3c 800 1500 0.76 727°C 600 0.022...
15. From the iron-carbon phase diagram (see Figure below) a. What are the concentrations of carbon...
15. From the iron-carbon phase diagram (see Figure below) a. What are the concentrations of carbon in each a-ferrite and Fe3C at a temperature just below 727°C? b. What are the phases involved in the eutectoid reaction? c. I am making a hyper-eutectoid steel with 2 wt%C. If I cool slowly from 1400°C, what phases and microstructure will I have at room temperature, assuming only equilibrium phases can be present? d. What is the euctectoid composition for Fe-C system shown...
Problem 9.70 (GO Tutorial) Consider 2.6 kg of a 99.4 wt% Fe-0.6 wt% C alloy that...
Problem 9.70 (GO Tutorial) Consider 2.6 kg of a 99.4 wt% Fe-0.6 wt% C alloy that is cooled to a temperature just below the eutectoid. The iron-iron carbide phase diagram is shown in the Animated Figure 9.24 (a) How many kilograms of proeutectoid ferrite form? kg [The tolerance is +/- 2.0%.] (b) How many kilograms of eutectoid ferrite form? kg [The tolerance is +/- 2.0%.] (c) How many kilograms of cementite form? kg [The tolerance is +/- 2.0%.] Composition =...
FOR QUESTIONS 22-25, REFER to the Iron (Fe)-Carbon (C) Phase Diagram Below position = 0 at%...
FOR QUESTIONS 22-25, REFER to the Iron (Fe)-Carbon (C) Phase Diagram Below position = 0 at% emperature = 0 °C Temperature 32 °F composition tal% C) 10 5 15 20 25 1600 1493 C 1400 2500 1394 °CL 1200 1147 ℃ 2.14 4.30 2000 1000 912 C -FeC 800 1500 727 "C 600! Feritte a FerC cementite (FeC- 1000 1085 °C 2 5 6 6.70 Composition (wt% C)
2. (a) What is a phase? Name two examples. (b) Label all the phase regions on...
2. (a) What is a phase? Name two examples. (b) Label all the phase regions on Figure 2 and write the eutectic and eutectoid reactions. Show also the steel and the cast iron intervals on Figure 2. (C) Select proper compositions, i.e. % C, that can be suitable for: (i) Car (highway) fender. (ii) Diesel engine block. (iii) Railway Composition (at% C) 0 1600 1538°C - 1493°C 10 15 20 25 1400 & 2500 1394°C 1200 1147C 2.14 4.30 2000...
Consider 1.1 kg of austenite containing 1.2 wt% C, cooled to below 727°C (1341°F). (a) How...
Consider 1.1 kg of austenite containing 1.2 wt% C, cooled to
below 727°C (1341°F). (a) How many kilograms of total ferrite form?
(b) How many kilograms of total cementite form? (c) How many
kilograms of pearlite form? (d) How many kilograms of the
proeutectoid phase form? The iron-iron carbide phase diagram is
shown in the Animated Figure 10.28
Composition = 0 wt% Composition = 0 at% emperature = 0 °C Temperature = 32 F Composition (at% C) 10 15 20...
8. For the Fe-C diagram answer the following a) Give the common name for the following...
8. For the Fe-C diagram answer the following a) Give the common name for the following phases - a, Y, FeC b) Assume each of the given compositions has been slowly cooled under equilibrium conditions to 700°C. Draw the microstructure of each, taking care to annotate drawings fully, including identification of phases, microconstituents, and features. Also list each phase composition...... (6 points) 100.0% Fe 0.2%C, 99.8%Fe 0.6%C, 99.4%Fe 0.76%C, 99.24%Fe () () () c) For a composition of 1 wt%...
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...
PROBLEM 11 (10 pts) Consider the phase diagram shown below. Be precise when you read the phase diagram. (a) (5 pts) Consider Fe - 1.9 wt% C steel at a temperature just below the eutectoid temperature. Determine the relative amount of the pearlite. Write the Lever rule expression used clearly. (b) (5 pts) Consider Fe - 0.6 wt% C steel at a temperature just below the eutectoid temperature. Determine the relative amount of the pearlite. Write the Lever rule expression...
Consider the Fe-Fe3C phase diagram and answer the following questions: 21. At a temperature just below the eutectic (1147°C) for a sample with 4 wt% C please calculate the mass fraction of (a) primary Y (austenite), (b) eutectic y (austenite), and for a sample with 5 wt% C please calculate the mass fraction of (c) primary Fe,c (cementite), (d) eutectic Fe C (cementite). (8%) 22. At a temperature just up the eutectic (1147°C), at first for a sample with 4...
Question 3 (1) Sketch the microstructures (at temperature just below eutectold temperature) of slow-cooled pure Iron (Owt%C) and steels with 0.3wt%C, and 0.76wt%C, and explain how the structures develop on cooling from 1100°C to room temperature (Figure 3.1 for Fe-Fe,c phase diagram, see below). (18marks] 1600 Composition Cat C) 10 is 20 25 1538"C 149346 1400 1394°C 2500 72 1200 1147°C > Austenite 2.14 4.30 Temperature) 2000 1000 Temperature (°F) 912°C y + Fe3c 800 1500 0.76 727°C 600 0.022...
15. From the iron-carbon phase diagram (see Figure below) a. What are the concentrations of carbon in each a-ferrite and Fe3C at a temperature just below 727°C? b. What are the phases involved in the eutectoid reaction? c. I am making a hyper-eutectoid steel with 2 wt%C. If I cool slowly from 1400°C, what phases and microstructure will I have at room temperature, assuming only equilibrium phases can be present? d. What is the euctectoid composition for Fe-C system shown...
Problem 9.70 (GO Tutorial) Consider 2.6 kg of a 99.4 wt% Fe-0.6 wt% C alloy that is cooled to a temperature just below the eutectoid. The iron-iron carbide phase diagram is shown in the Animated Figure 9.24 (a) How many kilograms of proeutectoid ferrite form? kg [The tolerance is +/- 2.0%.] (b) How many kilograms of eutectoid ferrite form? kg [The tolerance is +/- 2.0%.] (c) How many kilograms of cementite form? kg [The tolerance is +/- 2.0%.] Composition =...
FOR QUESTIONS 22-25, REFER to the Iron (Fe)-Carbon (C) Phase Diagram Below position = 0 at% emperature = 0 °C Temperature 32 °F composition tal% C) 10 5 15 20 25 1600 1493 C 1400 2500 1394 °CL 1200 1147 ℃ 2.14 4.30 2000 1000 912 C -FeC 800 1500 727 "C 600! Feritte a FerC cementite (FeC- 1000 1085 °C 2 5 6 6.70 Composition (wt% C)
2. (a) What is a phase? Name two examples. (b) Label all the phase regions on Figure 2 and write the eutectic and eutectoid reactions. Show also the steel and the cast iron intervals on Figure 2. (C) Select proper compositions, i.e. % C, that can be suitable for: (i) Car (highway) fender. (ii) Diesel engine block. (iii) Railway Composition (at% C) 0 1600 1538°C - 1493°C 10 15 20 25 1400 & 2500 1394°C 1200 1147C 2.14 4.30 2000...
Consider 1.1 kg of austenite containing 1.2 wt% C, cooled to
below 727°C (1341°F). (a) How many kilograms of total ferrite form?
(b) How many kilograms of total cementite form? (c) How many
kilograms of pearlite form? (d) How many kilograms of the
proeutectoid phase form? The iron-iron carbide phase diagram is
shown in the Animated Figure 10.28
Composition = 0 wt% Composition = 0 at% emperature = 0 °C Temperature = 32 F Composition (at% C) 10 15 20...
8. For the Fe-C diagram answer the following a) Give the common name for the following phases - a, Y, FeC b) Assume each of the given compositions has been slowly cooled under equilibrium conditions to 700°C. Draw the microstructure of each, taking care to annotate drawings fully, including identification of phases, microconstituents, and features. Also list each phase composition...... (6 points) 100.0% Fe 0.2%C, 99.8%Fe 0.6%C, 99.4%Fe 0.76%C, 99.24%Fe () () () c) For a composition of 1 wt%...
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