A large 0.55wt%C-steel piece is heated to 1052?C and exposed to oxygen-rich atmosphere. Thus, the steel’s...
A large 0.55wt%C-steel piece is heated to 1052?C and exposed to oxygen-rich atmosphere. Thus, the steel’s surface carbon concentration is maintained at 0wt%C (carbon-free). (This process is called decarburization).
D=4.37x10^-11 m^2/s
Determine the depth at which the carbon concentration reach 0.25wt% after a 10-hour decarburization treatment at 1052 C
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A large 0.55wt%C-steel piece is heated to 1052?C and exposed to
oxygen-rich atmosphere. Thus, the steel’s...
please solve 2. An FCC iron-carbon alloy initially containing 0.40 wt% C is exposed to an...
please solve
2. An FCC iron-carbon alloy initially containing 0.40 wt% C is exposed to an oxygen-rich and virtually carbon-free atmosphere at 1325 K (1052°C). Under these circumstances the carbon diffuses from the alloy and reacts at the surface with the oxygen in the atmosphere-that is, the carbon concentration at the surface position is maintained essentially at 0 wt% C. (This process of carbon depletion is termed decarburization.) At what position will the carbon concentration be 0.25 wt% after a...
C2. Depleting a steel of carbon using oxygen is termed decarburization. If an FCC iron-carbon alloy...
C2. Depleting a steel of carbon using oxygen is termed decarburization. If an FCC iron-carbon alloy initially containing 0.35 wt% C is exposed to an oxygen-rich and carbon-free atmosphere at 1127°C. The carbon concentration at the surface can be assumed to be at 0 wt% C. At what position will the carbon concentration be 0.15 wt% after a 10 hour treatment? The value of D at 1400 K is 6.9 x 10-11 m/s.
2. An FCC iron-carbon alloy initially containing 0.40 wt% C is exposed to an oxygen-rich and...
2. An FCC iron-carbon alloy initially containing 0.40 wt% C is exposed to an oxygen-rich and virtually carbon-free atmosphere at 1325 K (1052°C). Under these circumstances the carbon diffuses from the alloy and reacts at the surface with the oxygen in the atmosphere—that is, the carbon concentration at the surface position is maintained essentially at 0 wt% C. (This process of carbon depletion is termed decarburization.) At what position will the carbon concentration be 0.25 wt% after a 10-h treatment?...
In the carburizing process the steel piece was exposed, at an elevated temperature (900 °C), to...
In the carburizing process the steel piece was exposed, at an elevated temperature (900 °C), to an atmosphere rich in a hydrocarbon gas, such as methane CH Surface concentration of carbon is to be maintained at 1.18 wt%. Determine the time (in hours) necessary to achieve a carbon content of 0 68 wt% at a position 0.8 mm below the surface. Initial carbon concentration is 0 18 wt% Take the diffusion coefficient for carbon in iron at 900°C = 1.0...
An iron-carbon alloy initially containing 0.221wt% Cis exposed to an oxygen-rich and virtually carbon-free atmosphere at...
An iron-carbon alloy initially containing 0.221wt% Cis exposed to an oxygen-rich and virtually carbon-free atmosphere at 1090'C. Under these circumstances the carbon diffuses from the alloy and reacts at the Surface with the cxygen in the atmosphere; that is, the carbon concentration at the surface position is maintained essentialy at 00 wt% C.At what position will the carbon concentration be 0.166 wt% after a 6 h treatment? The value of D at 1090°C is 5.5x 100/s erfizk erflr) erfiz) 000...
Please show work for problems 1-4 1. Calculate the activation energy for vacancy formation in aluminum,...
Please show work for problems 1-4
1. Calculate the activation energy for vacancy formation in aluminum, given that the equilibrium number of vacancies at 500°C (773 K) is 7.57 x10m3. The atomic weight and density (at 500°c) for aluminum are 26.98 g/mol and 2.62 g/cm, respectively 2. What point defects are possible for Al,0, as an impurity in Mgo? How many Al ions must be added to form each of these defects? 3. A sheet of steel 4.5 mm thick...
A plate of iron is exposed to a carburizing (carbon-rich) atmosphere on one side and a...
A plate of iron is exposed to a carburizing (carbon-rich) atmosphere on one side and a decarburizing (carbon-deficient) atmosphere on the other side at 700℃. If a condition of steady-state is achieved, calculate the diffusion flux of carbon through the plate if the concentrations of carbon at positions of 5 and 10 mm beneath the carburizing surface are 1.2 and 0.8 ??/?^3, respectively. Assume a linear concentration profile and a diffusion coefficient of 3 × 10−11 ?^2/? at this temperature.
6.5 18. (8 pts) The Diffusivity of nitrogen in y-iron is 4 times higher at 1200°C...
6.5 18. (8 pts) The Diffusivity of nitrogen in y-iron is 4 times higher at 1200°C than at 950 C. (a) Find the activation energy for nitrogen diffusion in iron. R 1.987 cal/mol-K Do exp (1.987- wal vevisit lo ala exo 29 26, 451 l 2430. 10 alalS 29 24.851 2430 29 2a 24 30. 19. (10 pts) To improve the wear resistance of a steel gear, a carburization process is employed to harden the surface of the machine element...
please solve it as soon as u can 2 Chapte c Antrop G Antrop 4R0* G...
please solve it as soon as u can
2 Chapte c Antrop G Antrop 4R0* G The di * This is * The Di Solved * Math + missouri.instructure.com/courses/23331/assignments/513990 ?module_item_id=1411967 Question 4 0/3 View Policies Show Attempt History Current Attempt in Progress Ses An iron-carbon alloy initially containing 0.245 W i s exposed to an oxygenrich and virtually carbon-free atmosphere at 1100°C. Under these drcumstances the carbon diffuses from the allorandreacts at the surface with the oxygen in the atmosphere...
QUESTION 10 A(n) ____________ is a variety of an element with the same number of protons...
QUESTION 10 A(n) ____________ is a variety of an element with the same number of protons and electrons as the other types of the element but a different number of neutrons. 1 points QUESTION 11 Isotope fractionation occurs when a physical or chemical process causes the relative abundance of the isotopes in a sample of matter to change based on the count of the isotopes. True False 1 points QUESTION 12 Why does evaporation cause water vapor to...
please solve
2. An FCC iron-carbon alloy initially containing 0.40 wt% C is exposed to an oxygen-rich and virtually carbon-free atmosphere at 1325 K (1052°C). Under these circumstances the carbon diffuses from the alloy and reacts at the surface with the oxygen in the atmosphere-that is, the carbon concentration at the surface position is maintained essentially at 0 wt% C. (This process of carbon depletion is termed decarburization.) At what position will the carbon concentration be 0.25 wt% after a...
C2. Depleting a steel of carbon using oxygen is termed decarburization. If an FCC iron-carbon alloy initially containing 0.35 wt% C is exposed to an oxygen-rich and carbon-free atmosphere at 1127°C. The carbon concentration at the surface can be assumed to be at 0 wt% C. At what position will the carbon concentration be 0.15 wt% after a 10 hour treatment? The value of D at 1400 K is 6.9 x 10-11 m/s.
2. An FCC iron-carbon alloy initially containing 0.40 wt% C is exposed to an oxygen-rich and virtually carbon-free atmosphere at 1325 K (1052°C). Under these circumstances the carbon diffuses from the alloy and reacts at the surface with the oxygen in the atmosphere—that is, the carbon concentration at the surface position is maintained essentially at 0 wt% C. (This process of carbon depletion is termed decarburization.) At what position will the carbon concentration be 0.25 wt% after a 10-h treatment?...
In the carburizing process the steel piece was exposed, at an elevated temperature (900 °C), to an atmosphere rich in a hydrocarbon gas, such as methane CH Surface concentration of carbon is to be maintained at 1.18 wt%. Determine the time (in hours) necessary to achieve a carbon content of 0 68 wt% at a position 0.8 mm below the surface. Initial carbon concentration is 0 18 wt% Take the diffusion coefficient for carbon in iron at 900°C = 1.0...
An iron-carbon alloy initially containing 0.221wt% Cis exposed to an oxygen-rich and virtually carbon-free atmosphere at 1090'C. Under these circumstances the carbon diffuses from the alloy and reacts at the Surface with the cxygen in the atmosphere; that is, the carbon concentration at the surface position is maintained essentialy at 00 wt% C.At what position will the carbon concentration be 0.166 wt% after a 6 h treatment? The value of D at 1090°C is 5.5x 100/s erfizk erflr) erfiz) 000...
Please show work for problems 1-4
1. Calculate the activation energy for vacancy formation in aluminum, given that the equilibrium number of vacancies at 500°C (773 K) is 7.57 x10m3. The atomic weight and density (at 500°c) for aluminum are 26.98 g/mol and 2.62 g/cm, respectively 2. What point defects are possible for Al,0, as an impurity in Mgo? How many Al ions must be added to form each of these defects? 3. A sheet of steel 4.5 mm thick...
6.5 18. (8 pts) The Diffusivity of nitrogen in y-iron is 4 times higher at 1200°C than at 950 C. (a) Find the activation energy for nitrogen diffusion in iron. R 1.987 cal/mol-K Do exp (1.987- wal vevisit lo ala exo 29 26, 451 l 2430. 10 alalS 29 24.851 2430 29 2a 24 30. 19. (10 pts) To improve the wear resistance of a steel gear, a carburization process is employed to harden the surface of the machine element...
please solve it as soon as u can
2 Chapte c Antrop G Antrop 4R0* G The di * This is * The Di Solved * Math + missouri.instructure.com/courses/23331/assignments/513990 ?module_item_id=1411967 Question 4 0/3 View Policies Show Attempt History Current Attempt in Progress Ses An iron-carbon alloy initially containing 0.245 W i s exposed to an oxygenrich and virtually carbon-free atmosphere at 1100°C. Under these drcumstances the carbon diffuses from the allorandreacts at the surface with the oxygen in the atmosphere...
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