In the diagram below, what is the eutectic temperature and what is the eutectoid temperature of steel?
| A. |
eutectic temperature: 1539°C, eutectoid temperature: 723°C. |
|
| B. |
eutectic temperature: 723°C, eutectoid temperature: 1539°C. |
|
| C. |
eutectic temperature: 723°C, eutectoid temperature: 1130°C. |
|
| D. |
eutectic temperature: 1130°C, eutectoid temperature: 723°C. |
In the diagram below, what is the eutectic composition and what is the eutectoid composition of steel?
A. eutectic composition: 4.3 wt% C, eutectoid composition: 0.83 wt% C.
B. eutectic composition: 0.83 wt% C, eutectoid composition: 4.3 wt% C
C. eutectic composition: 6.67 wt% C, eutectoid composition: 0.83 wt% C.
D. eutectic composition: 0.83 wt% C, eutectoid composition: 6.67 wt% C.
Homework Answers
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In the diagram below, what is the eutectic temperature and what
is the eutectoid temperature of...
8. For an alloy with 1.25 wt% Cat temperature just below eutectoid, determine the following: a....
8. For an alloy with 1.25 wt% Cat temperature just below eutectoid, determine the following: a. The fractions of total ferrite and cementite phases b. The fractions of pro-eutectoid cementite and pearlite C. The fraction of eutectoid cementite 9. For an eutectoid steel, sketch and label a time-temperature path that will produce the following: a. 50% Pearlite & 50% Bainite b. 100% Martensite C. 100% Coarse Pearlite
For a 0.84 wt% C steel just below the eutectoid temperature, calculate the following:
Material Science QuestionFor a 0.84 wt% C steel just below the eutectoid temperature,
calculate the following:The fractions of total ferrite and cementite phases, the
fractions of the proeutectoid cementite and pearlite, and the
fraction of eutectoid cementite
3. For hypo-eutectoid steel (say, carbon content equal to 0 .40 wt%)
3. For hypo-eutectoid steel (say, carbon content equal to 0 .40 wt%), if cool from austenite to below eutectoid temperature, calculate the relative amount of pro-eutectoid ferrite and Pearlite. What is the carbon content of the Pearlite microconstituent? What is the carbon content of the pro-eutectoid constituent? Calculate the relative amount of a and Fe3C phase in the perlite constituent. 4. For hyper-eutectoid steel (say, carbon content equal to 1.2 wt%), if cool from austenite to below eutectoid temperature, calculate the...
Determine the amount of pearlite in 99.5% Fe - 0.5% C alloy that is cooled slowly...
Determine the amount of pearlite in 99.5% Fe - 0.5% C
alloy that is cooled slowly from 870 degrees Celsius to just below
the eutectoid temperature. Also determine the amount of cementite
and ferrite at 726 degrees Celsius. Use 100g of alloy as your
base.
Fe Fe C Phase Diagram 1400 Entectic point 1200- 1147? 2.14 4.30 ? Ferrite ? Austenite ? Ferrite FeC Cementite 7-Austenite 912C 74 Fe-C Ledeburte ? + Fee Pearlite 800 72T C proint 0.022 600...
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...
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...
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...
please answer question 2,3,4 A critical feature of steel is that a considerable amount of...
please answer question 2,3,4
A critical feature of steel is that a considerable amount of carbon can be dissolved in the austenite, phase, (up to 2.14 w/o at 1147"C), whereas carbon is essentially insoluble in ferrite, Cooling from point d to e, just above the eutectoid but still in the an increased fraction of the +y region, will produce phase and a microstructure similar to that shown: the particles precinitates out in the form af an intermetallic.compound called iron-carbide...
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...
4. (12 marks) This question pertains to the iron-iron carbide phase dingrane below 1%)() 2.11 43...
4. (12 marks) This question pertains to the iron-iron carbide phase dingrane below 1%)() 2.11 43 Ai 0.77 727"C 6.67 500 0.0218 Fe,C Weight percent carborn For a Fe-0.6 wt% C alloy at temperature just below the eutectoid. (a) calculate the fractions of total ferrite and cementite phases b) Calculate fractions of the proeutectoid ferrite and pearlite.
8. For an alloy with 1.25 wt% Cat temperature just below eutectoid, determine the following: a. The fractions of total ferrite and cementite phases b. The fractions of pro-eutectoid cementite and pearlite C. The fraction of eutectoid cementite 9. For an eutectoid steel, sketch and label a time-temperature path that will produce the following: a. 50% Pearlite & 50% Bainite b. 100% Martensite C. 100% Coarse Pearlite
Material Science QuestionFor a 0.84 wt% C steel just below the eutectoid temperature,
calculate the following:The fractions of total ferrite and cementite phases, the
fractions of the proeutectoid cementite and pearlite, and the
fraction of eutectoid cementite
Determine the amount of pearlite in 99.5% Fe - 0.5% C
alloy that is cooled slowly from 870 degrees Celsius to just below
the eutectoid temperature. Also determine the amount of cementite
and ferrite at 726 degrees Celsius. Use 100g of alloy as your
base.
Fe Fe C Phase Diagram 1400 Entectic point 1200- 1147? 2.14 4.30 ? Ferrite ? Austenite ? Ferrite FeC Cementite 7-Austenite 912C 74 Fe-C Ledeburte ? + Fee Pearlite 800 72T C proint 0.022 600...
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...
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...
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...
please answer question 2,3,4
A critical feature of steel is that a considerable amount of carbon can be dissolved in the austenite, phase, (up to 2.14 w/o at 1147"C), whereas carbon is essentially insoluble in ferrite, Cooling from point d to e, just above the eutectoid but still in the an increased fraction of the +y region, will produce phase and a microstructure similar to that shown: the particles precinitates out in the form af an intermetallic.compound called iron-carbide...
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...
4. (12 marks) This question pertains to the iron-iron carbide phase dingrane below 1%)() 2.11 43 Ai 0.77 727"C 6.67 500 0.0218 Fe,C Weight percent carborn For a Fe-0.6 wt% C alloy at temperature just below the eutectoid. (a) calculate the fractions of total ferrite and cementite phases b) Calculate fractions of the proeutectoid ferrite and pearlite.
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