State the composition Fe and C of plain carbon eutectoid steel. Determine wt% for: α ferrite,...
State the composition Fe and C of plain carbon eutectoid steel. Determine wt%
for: α ferrite, Fe3C cementite, assume equilibrium cooling process.
Homework Answers
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State the composition Fe and C of plain carbon eutectoid steel.
Determine wt%
for: α ferrite,...
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 validity of each of the following statements conceding the Fe-Fe_3C steel system. Toughness in...
Determine the validity of each of the following statements conceding the Fe-Fe_3C steel system. Toughness in steels is derived from having a continuous cementite matrix. Carbon is generally more soluble in austenite (y-Fe) than finite (a-Fe) B. False Austenite (y-Fe) is more ductile than finite (a-Fe) Strength in steels increases with increasing carbon concentration. Hardness in steels increases with increasing cementite (Fe3C) concentration. Slow cooling of a 0.76 wt% steel will produce a featuring a PR eutectoid phase. Strength in...
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...
Given a plain carbon steel which has 8 % primary (or pro eutectoid) carbide, determine both...
Given a plain carbon steel which has 8 % primary (or pro eutectoid) carbide, determine both overall carbon content and ferrite content. Assume that the steel was at equilibrium just above the eutectoid temperature and then cooled immediately to 600ºC and held for 5 seconds, then quenched. What microconstituents would there be in the structure and how much of each? (Assume the cooling behavior follows the TTT curve shown)
please explain with the figure 2 A plain plain carbon steel of unknown composition is cooled...
please explain with the figure
2 A plain plain carbon steel of unknown composition is cooled in the furnace from w oning temperature. At room temperature, the percentage of primary (proeutectoid) ferrite() monin this steel is found to be 27%. Use Figure 1 and answer the following questions. What is the concentration of carbon present in this steel? b) Which other phase or phases will you find in the structure of this steel? c) Calculate the amount of the phase...
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 =...
Given a plain carbon steel which has 8 % primary (or pro eutectoid) carbide, determine both...
Given a plain carbon steel which has 8 % primary (or pro
eutectoid) carbide, determine both overall carbon content and
ferrite content. Assume that the steel was at equilibrium just
above the eutectoid temperature and then cooled immediately to
600ºC and held for 5 seconds, then quenched. What microconstituents
would there be in the structure and how much of each? (Assume the
cooling behavior follows the TTT curve shown)
800 Eutectoid temperature 1400 700 А 1200 600 1000 500 B...
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
The phase diagram for the iron-carbon Fe-C system is shown below. use it to answer the...
The phase diagram for the iron-carbon Fe-C system is shown
below. use it to answer the following questions
a) How many different solid allotropes (phases) does pure iron
have?
b) what is the maximum carbon solubility of carbon in
austentite?
c) what is the maximum carbon solubility of carbon in
ferrite?
d)On cooling the following phase reaction occurs at 0.76% C and
727*c y--> alpha + Fe3C. On cooling what phase reaction occurs
at .16% C and 1493*c?
e)For a...
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...
Determine the validity of each of the following statements conceding the Fe-Fe_3C steel system. Toughness in steels is derived from having a continuous cementite matrix. Carbon is generally more soluble in austenite (y-Fe) than finite (a-Fe) B. False Austenite (y-Fe) is more ductile than finite (a-Fe) Strength in steels increases with increasing carbon concentration. Hardness in steels increases with increasing cementite (Fe3C) concentration. Slow cooling of a 0.76 wt% steel will produce a featuring a PR eutectoid phase. Strength in...
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 explain with the figure
2 A plain plain carbon steel of unknown composition is cooled in the furnace from w oning temperature. At room temperature, the percentage of primary (proeutectoid) ferrite() monin this steel is found to be 27%. Use Figure 1 and answer the following questions. What is the concentration of carbon present in this steel? b) Which other phase or phases will you find in the structure of this steel? c) Calculate the amount of the phase...
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 =...
Given a plain carbon steel which has 8 % primary (or pro
eutectoid) carbide, determine both overall carbon content and
ferrite content. Assume that the steel was at equilibrium just
above the eutectoid temperature and then cooled immediately to
600ºC and held for 5 seconds, then quenched. What microconstituents
would there be in the structure and how much of each? (Assume the
cooling behavior follows the TTT curve shown)
800 Eutectoid temperature 1400 700 А 1200 600 1000 500 B...
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
The phase diagram for the iron-carbon Fe-C system is shown
below. use it to answer the following questions
a) How many different solid allotropes (phases) does pure iron
have?
b) what is the maximum carbon solubility of carbon in
austentite?
c) what is the maximum carbon solubility of carbon in
ferrite?
d)On cooling the following phase reaction occurs at 0.76% C and
727*c y--> alpha + Fe3C. On cooling what phase reaction occurs
at .16% C and 1493*c?
e)For a...
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...
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