Material Science Question
For 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
Homework Answers
Fraction of total ferrite = X/X+T .
Fraction of total cementite = T/X+T .
Fraction of proeutectoid cementite = V/V+X .
Fraction of pearlite = X/V+X .
Fraction of eutectoid cementite = (T/X+T) - (V/V+X) .
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For a 0.84 wt% C steel just below the eutectoid temperature, calculate the following:
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
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...
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.
In the diagram below, what is the eutectic temperature and what is the eutectoid temperature of...
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...
please answer all questions clearly. thank you 3. In the steels below calculate the carbon content...
please answer all questions clearly. thank you
3. In the steels below calculate the carbon content and comment whether the steel is hypo- or hyper- eutectoid. (a) Steel 1, containing 8% cementite and 92% ferrite at room temperature (b) Steel 3 containing 18% cementite and 82% ferrite at room temperature (c) Steel 3 containing i 8% pearlite and 82% proeutectoid ferrite at room temperature (d) Steel 4 containing 94% pearlite and 6% proeutectoid cementite at room temperature
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...
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...
Using the Animated Figure 10.40, the isothermal transformation diagram for a 0.45 wt%C steel alloy, specify...
Using the Animated Figure 10.40, the isothermal transformation diagram for a 0.45 wt%C steel alloy, specify the nature of the final microstructure in terms of the microconstituents present) of a small specimen that has been subjected to the following temperature treatments. In each case assume that the specimen begins at 845 °C and that it has been held at this temperature long enough to have achieved a complete and homogeneous austenitic structure. a) Rapidly cool to 700 degrees C, hold...
You have a 1.8 kg sample of austenite containing 0.13 wt% C and it is cooled...
You have a 1.8 kg sample of austenite containing 0.13 wt% C and
it is cooled to less than 727°C (1341°F). The proeutectoid phase is
??ferrite.
(a) How many kilograms each of total ferrite and cementite
form?
___ kg of ferrite, ___ kg of Fe3C
(b) How many kilograms each of pearlite and the proeutectoid
phase form?
___ kg of proeutectoid ferrite, ___ kg of pearlite
composition wt% C Composition at% C Temperature 400 °C 1 Temperature-752 Composition (at% C)...
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.
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
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.
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...
please answer all questions clearly. thank you
3. In the steels below calculate the carbon content and comment whether the steel is hypo- or hyper- eutectoid. (a) Steel 1, containing 8% cementite and 92% ferrite at room temperature (b) Steel 3 containing 18% cementite and 82% ferrite at room temperature (c) Steel 3 containing i 8% pearlite and 82% proeutectoid ferrite at room temperature (d) Steel 4 containing 94% pearlite and 6% proeutectoid cementite at room temperature
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...
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...
Using the Animated Figure 10.40, the isothermal transformation diagram for a 0.45 wt%C steel alloy, specify the nature of the final microstructure in terms of the microconstituents present) of a small specimen that has been subjected to the following temperature treatments. In each case assume that the specimen begins at 845 °C and that it has been held at this temperature long enough to have achieved a complete and homogeneous austenitic structure. a) Rapidly cool to 700 degrees C, hold...
You have a 1.8 kg sample of austenite containing 0.13 wt% C and
it is cooled to less than 727°C (1341°F). The proeutectoid phase is
??ferrite.
(a) How many kilograms each of total ferrite and cementite
form?
___ kg of ferrite, ___ kg of Fe3C
(b) How many kilograms each of pearlite and the proeutectoid
phase form?
___ kg of proeutectoid ferrite, ___ kg of pearlite
composition wt% C Composition at% C Temperature 400 °C 1 Temperature-752 Composition (at% C)...
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