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2. (40 points) What is microstructures of pearlite, bainite, and spheroidite and how different they are...
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
o What is easier: Homogeneous or heterogeneous nucleation? Why? o What does an Isothermal Transformation (IT)...
o What is easier: Homogeneous or heterogeneous nucleation? Why? o What does an Isothermal Transformation (IT) Diagram tell us? o How do nucleation rates and diffusion rates influence the shape of the IT Diagram? o What do the letters "A", "F", "P" "B", and "M" mean on these diagrams? o What are the similarities and differences between the following microstructures: Coarse Pearlite; Fine Pearlite; Bainite; Spheroidite; and Tempered Martensite? o How is Martensite (not the tempered kind) formed, and how...
7.a) Describe the formation of pearlite, bainite, and martensite in the isothermal transformation. Mark each of...
7.a) Describe the formation of pearlite, bainite, and martensite in the isothermal transformation. Mark each of it at the right locations in the diagram given below for the Iron-Carbon alloy by copying the figure. Points: 5 800 T(°C) TE 600 1 400 - 200 - 10-1 10 10 105 b) Briefly explain how coarse and fine pearlites are prepared and why fine pearlite is harder and stronger than coarse pearlite. Points: 5
Question 5. (a) Suppose this transformation is occurring at 600°C. Using Fig. 1, how long will th...
Please clearly state how you got to the answer. Thanks.
Question 5. (a) Suppose this transformation is occurring at 600°C. Using Fig. 1, how long will this transformation take to convert 50% of the austenite to pearlite? (b) How about 99% of the austenite to pearlite? (c) Using Fig. 2, estimate the hardness of this alloy after complete conversion. Question 6. (a) Fine and coarse pearlite are both comprised of lamellae of cementite and ferrite. How is each formed and...
please show any calculations (16 points) Label the following microstructures of 10140 (1.4 wt% Carbon) steel...
please show any calculations
(16 points) Label the following microstructures of 10140 (1.4 wt% Carbon) steel given the stated treatments. Be sure to label ALL of the phases AND constituents a. Fully Annealed Condition 4" b. As Quenche Conditiorn c. Quenched and Tempered Condition: 5. (6 points) Calculate how much of each phase is present in condition "a": 6. (6 points) Calculate how much of each constituent is present in condition "a":
(1s) The TTT d austenitized. Determine the final amount (approximate percentages) of each microstructure, and show basic path (draw on charts). 6. agram for an iron-carbon alloy w, h 0.76%C steel is...
(1s) The TTT d austenitized. Determine the final amount (approximate percentages) of each microstructure, and show basic path (draw on charts). 6. agram for an iron-carbon alloy w, h 0.76%C steel is given. Assume that the specimen gans above 800°C for each case and that it has been held at this temperature long enough to be fully microstructure (such as bauxite, magnetite, bainite, pearlite, um, martensite, spheroidite, cementite). Must specify microstructure name (not a letter). 800 a) Sample 1- Decrease...
1 picture- problem 2 other pictures- phase diagrams for problem 1. Draw a phase diagram for...
1 picture- problem
2 other pictures- phase diagrams for problem
1. Draw a phase diagram for a binary eutectic alloy with solid solubility, naming and describing the significance of the main features. The binary alloy system of metals A and B contains two intermediate (intermetallic) phases A B and AB2 of narrow composition range, each of which forms by a peritectic reaction A cutectic point also exists, at 85at% B. The melting point of A is higher than that of...
Austenite Pearlite Question 3 (24 pts): We are interested in performing different heat treatments to an...
Austenite Pearlite Question 3 (24 pts): We are interested in performing different heat treatments to an iron-carbon alloy of eutectoid compostion. Use the provided Temperature-Time Transformation (TTT) and Continuous Cooling Transformation (CCT) diagrams to specify the nature of the final microstructure in terms of microconstituents present and approximate percentages) of a small specimen that has been subjected to the following heat treatments. In each case, assume that the specimen begins at 760°C and that it has been at this temperature...
I am studying material science in engineering. Please help me solve this as I am in...
I am studying material science in engineering. Please help me
solve this as I am in need of help.
Please explain this step by step with proper solutions.
Thanks alot
The quenching of steels 800 Eutectoid temperature 400 700 1200 600 1000 500 2 8 400 800 M A 400 M (50%) 100 200 0 102 Time Is) 10 103 104 Referring to the TTT diagram above 2.1 Describe the microstructure that results from i) Cooling rapidly to 560°C, holding...
Question 19 ( 2 Points Hunter-gatherer societies are limited in size to around 40 people because...
Question 19 ( 2 Points Hunter-gatherer societies are limited in size to around 40 people because if they ever got larger they would A turn into a different type of society by definition B get into too many fights with each other C lose their tax-exempt status D starve Question 20 2 Points What invention made agricultural societies possible? A fire B the computer C electricity D the plow
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
o What is easier: Homogeneous or heterogeneous nucleation? Why? o What does an Isothermal Transformation (IT) Diagram tell us? o How do nucleation rates and diffusion rates influence the shape of the IT Diagram? o What do the letters "A", "F", "P" "B", and "M" mean on these diagrams? o What are the similarities and differences between the following microstructures: Coarse Pearlite; Fine Pearlite; Bainite; Spheroidite; and Tempered Martensite? o How is Martensite (not the tempered kind) formed, and how...
7.a) Describe the formation of pearlite, bainite, and martensite in the isothermal transformation. Mark each of it at the right locations in the diagram given below for the Iron-Carbon alloy by copying the figure. Points: 5 800 T(°C) TE 600 1 400 - 200 - 10-1 10 10 105 b) Briefly explain how coarse and fine pearlites are prepared and why fine pearlite is harder and stronger than coarse pearlite. Points: 5
Please clearly state how you got to the answer. Thanks.
Question 5. (a) Suppose this transformation is occurring at 600°C. Using Fig. 1, how long will this transformation take to convert 50% of the austenite to pearlite? (b) How about 99% of the austenite to pearlite? (c) Using Fig. 2, estimate the hardness of this alloy after complete conversion. Question 6. (a) Fine and coarse pearlite are both comprised of lamellae of cementite and ferrite. How is each formed and...
please show any calculations
(16 points) Label the following microstructures of 10140 (1.4 wt% Carbon) steel given the stated treatments. Be sure to label ALL of the phases AND constituents a. Fully Annealed Condition 4" b. As Quenche Conditiorn c. Quenched and Tempered Condition: 5. (6 points) Calculate how much of each phase is present in condition "a": 6. (6 points) Calculate how much of each constituent is present in condition "a":
(1s) The TTT d austenitized. Determine the final amount (approximate percentages) of each microstructure, and show basic path (draw on charts). 6. agram for an iron-carbon alloy w, h 0.76%C steel is given. Assume that the specimen gans above 800°C for each case and that it has been held at this temperature long enough to be fully microstructure (such as bauxite, magnetite, bainite, pearlite, um, martensite, spheroidite, cementite). Must specify microstructure name (not a letter). 800 a) Sample 1- Decrease...
1 picture- problem
2 other pictures- phase diagrams for problem
1. Draw a phase diagram for a binary eutectic alloy with solid solubility, naming and describing the significance of the main features. The binary alloy system of metals A and B contains two intermediate (intermetallic) phases A B and AB2 of narrow composition range, each of which forms by a peritectic reaction A cutectic point also exists, at 85at% B. The melting point of A is higher than that of...
Austenite Pearlite Question 3 (24 pts): We are interested in performing different heat treatments to an iron-carbon alloy of eutectoid compostion. Use the provided Temperature-Time Transformation (TTT) and Continuous Cooling Transformation (CCT) diagrams to specify the nature of the final microstructure in terms of microconstituents present and approximate percentages) of a small specimen that has been subjected to the following heat treatments. In each case, assume that the specimen begins at 760°C and that it has been at this temperature...
I am studying material science in engineering. Please help me
solve this as I am in need of help.
Please explain this step by step with proper solutions.
Thanks alot
The quenching of steels 800 Eutectoid temperature 400 700 1200 600 1000 500 2 8 400 800 M A 400 M (50%) 100 200 0 102 Time Is) 10 103 104 Referring to the TTT diagram above 2.1 Describe the microstructure that results from i) Cooling rapidly to 560°C, holding...
Question 19 ( 2 Points Hunter-gatherer societies are limited in size to around 40 people because if they ever got larger they would A turn into a different type of society by definition B get into too many fights with each other C lose their tax-exempt status D starve Question 20 2 Points What invention made agricultural societies possible? A fire B the computer C electricity D the plow
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