For an Fe-C binary system, list the carbon concentrations required to achieve the following microstructures/microconstituents: (a)...
For an Fe-C binary system, list the carbon concentrations required to achieve the following microstructures/microconstituents:
(a) pearlite
(b) a mixture of pearlite & proeutectoid ferrite
(c) bainite
(d) spheroidite
(e) a mixture of pearlite and proeutectoid cementite
Homework Answers
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For an Fe-C binary system, list the carbon concentrations
required to achieve the following
microstructures/microconstituents:
(a)...
Q2. Below is shown the isothermal transformation diagram for a 0.45 wt% C iron-carbon alloy. List...
Q2. Below is shown the isothermal transformation diagram for a 0.45 wt% C iron-carbon alloy. List the microconstituent(s) present for the heat treatment labeled on this diagram. It is not necessary to state the proportion(s) of the microconstituents. 6 options are given for each case. Pick the correct components and briefly explain your answer. (15 points) 900 1600 HIV 500 ZA+B (c) Temperature (°C) (6) A 6 Temperature (°F) Mstart) 300M(50%) ©) b) (90%) TTTT (b) (c) '(a) 103 (b)...
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...
Which of the following correctly ranks some potential microstructures of iron-carbon alloys by their expected hardness,...
Which of the following correctly ranks some potential
microstructures of iron-carbon alloys by their expected hardness,
from lowest to highest?
Make sure to log into Canvas before midnight tonight to complete the Extra Credit Question! Question 26 1 pts Which of the following correctly ranks some potential microstructures of iron-carbon alloys by their expected hardness, from lowest to highest? pearlite, bainite, spheroidite, martensite spheroidite, pearlite, bainite, martensite spheroidite, pearlite, martensite, bainite martensite, bainite, pearlite, spheroidite bainite, martensite, pearlite, spheroidite
X Incorrect. Using the Animated Figure 10.40, the isothermal transformation diagram for a 0.45 wt% steel...
X Incorrect. Using the Animated Figure 10.40, the isothermal transformation diagram for a 0.45 wt% 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 250 degrees...
brittie. nk the following iron-carbon alloys and as- 11.32 ated microstructures from the most ductile to...
brittie. nk the following iron-carbon alloys and as- 11.32 ated microstructures from the most ductile to the most brittle: 0.20 wt% carbon with coarse pearlite (b) 0.20 wt% carbon with spheroidite (c) 0.75 wt% C with fine pearlite (d) 0.75 wt% C with coarse pearlite Justify this ranking.
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
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%...
3. For the Fe-C diagram answer the following ...(11 points) a) Give the common name for...
3. For the Fe-C diagram answer the following ...(11 points) a) Give the common name for the following phases - a, y, FezC...(1 point) 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 () (0) () (0) c) For a composition...
7. A hypereutectoid steel contains 0.8% C. When slow cooled from austenite the following transformation products...
7. A hypereutectoid steel contains 0.8% C. When slow cooled from austenite the following transformation products result. a) ferrite and bainite b) ferrite and martensite c) ferrite and pearlite d) pearlite and cementite 8. Pearlite is a combination of a) cementite and iron carbide b) ferrite and cementite c) ferrite and bainite d) ferrite and martensite 9. The process of hardening steel consists of what two steps? a) melting the steel followed by quenching b) melting the steel followed by...
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...
Q2. Below is shown the isothermal transformation diagram for a 0.45 wt% C iron-carbon alloy. List the microconstituent(s) present for the heat treatment labeled on this diagram. It is not necessary to state the proportion(s) of the microconstituents. 6 options are given for each case. Pick the correct components and briefly explain your answer. (15 points) 900 1600 HIV 500 ZA+B (c) Temperature (°C) (6) A 6 Temperature (°F) Mstart) 300M(50%) ©) b) (90%) TTTT (b) (c) '(a) 103 (b)...
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...
Which of the following correctly ranks some potential
microstructures of iron-carbon alloys by their expected hardness,
from lowest to highest?
Make sure to log into Canvas before midnight tonight to complete the Extra Credit Question! Question 26 1 pts Which of the following correctly ranks some potential microstructures of iron-carbon alloys by their expected hardness, from lowest to highest? pearlite, bainite, spheroidite, martensite spheroidite, pearlite, bainite, martensite spheroidite, pearlite, martensite, bainite martensite, bainite, pearlite, spheroidite bainite, martensite, pearlite, spheroidite
X Incorrect. Using the Animated Figure 10.40, the isothermal transformation diagram for a 0.45 wt% 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 250 degrees...
brittie. nk the following iron-carbon alloys and as- 11.32 ated microstructures from the most ductile to the most brittle: 0.20 wt% carbon with coarse pearlite (b) 0.20 wt% carbon with spheroidite (c) 0.75 wt% C with fine pearlite (d) 0.75 wt% C with coarse pearlite Justify this ranking.
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
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%...
3. For the Fe-C diagram answer the following ...(11 points) a) Give the common name for the following phases - a, y, FezC...(1 point) 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 () (0) () (0) c) For a composition...
7. A hypereutectoid steel contains 0.8% C. When slow cooled from austenite the following transformation products result. a) ferrite and bainite b) ferrite and martensite c) ferrite and pearlite d) pearlite and cementite 8. Pearlite is a combination of a) cementite and iron carbide b) ferrite and cementite c) ferrite and bainite d) ferrite and martensite 9. The process of hardening steel consists of what two steps? a) melting the steel followed by quenching b) melting the steel followed by...
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...
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