please clearly show what values equal what in the formula I don't understand what to do with both diffusion coefficients
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please clearly show what values equal what in the
formula I don't understand what to do...
Nitrogen from a gaseous phase is to be diffused into pure iron at 700°C. If the...
Nitrogen from a gaseous phase
is to be diffused into pure iron at 700°C. If the surface
concentration is maintained at 0.12 wt% N, what will be the
concentration (in weight percent) 3.7 mm from the surface after 8.3
h? The diffusion coefficient for nitrogen in iron at 700°C is 3.0 ×
10-10 m2/s.
Also, A cylindrical specimen of a brass alloy 10.1 mm (0.3976
in.) in diameter and 119.8 mm (4.717 in.) long is pulled in tension
with a...
Please answer all the three questions.. Please please 7. (8 points) Carburization is an industrial process...
Please answer all the three questions.. Please please
7. (8 points) Carburization is an industrial process to harden steel components through diffusion. It is done at elevated temperature because a. Steels have high yield strength b. Catoms can penetrate into the component's surface through vacancy diffusion c. Catoms can penetrate into the component's surface through interstitial diffusion d. Diffusivity is high at elevated temperature 8. (15 Points) The bonding energy Ex between two atoms is a function of interatomic distance...
No. 5 (20 points) (a) Determine the time necessary to achieve a carbon concentration of 0.30 wt.% at a position of 4 mm...
No. 5 (20 points) (a) Determine the time necessary to achieve a carbon concentration of 0.30 wt.% at a position of 4 mm into an iron-carbon alloy that initially contains 0.10 wt. % C. The surface concentration is to be maintained at 0.90 wt.% C, and the diffusion coefficient of C is 7.0 x 10-11 m2/sec. (10 points) (b) The diffusion coefficient of Ni in a stainless steel (fcc) is 1 x 1022 m2/sec at 500°C and 1 x 10-15...
Niobium forms a substitutional solid solution with vanadium. Compute the weight percent of niobium that must...
Niobium forms a substitutional solid solution with vanadium. Compute the weight percent of niobium that must be added to vanadium to yield an alloy that contains 1.55 times 10%22 Nb atoms per cubic centimeter. The densities of pure Nb and V are 8.57 and 6.10 g/cm^3, respectively. Gold forms a substitutional solid solution with silver. Compute the number of gold atoms per cubic centimeter for a silver-gold alloy that contains 10 wt% Au and 90 wt% Ag. The densities of...
UTVER VIS Concentration of Nitrogen (wt%): = 0.21 Position in mm= 7.2 Diffusion Coefficient for Nitrogen...
UTVER VIS Concentration of Nitrogen (wt%): = 0.21 Position in mm= 7.2 Diffusion Coefficient for Nitrogen in Iron at 700°C -8.90E-10 Nitrogen in Iron Heat Treatment Time (hours): = 8 Carburizing Time (hrs): = 7 Steel Alloy Case Depth (mm): 4.8 Steel Alloy New Case Depth (mm) - 9.9 Activation Energy kJ/mol: = 103 Temperature for Problem 3 (Celsius) -809 . Data for Problem 4 Temperature in C: -595 Diffusivity (m2/s) = 5.62E-14 Temperature in C: -702 Diffusivity (m /s)...
In carburizing an alloy that initially has a uniform carbon concentration of .25 wt% and is...
In carburizing an alloy that initially has a uniform carbon concentration of .25 wt% and is to be treated at 1223 K, if the concentration of carbon at the surface is suddenly brought to and maintained at 1.20 wt%, how long will it take to achieve a carbon content of 0.80 wt% at a position of 0.5 mm below the surface? The diffusion coefficient for carbon in iron at this temperature is 1.6 x 10-11 m 2 /s.
Nitrogen from a gaseous phase is to be diffused into pure iron at 700°C. If the...
Nitrogen from a gaseous phase is to be diffused into pure iron at 700°C. If the surface concentration is maintained at 0.12 wt% N, what will be the concentration (in weight percent) 3.9 mm from the surface after 6.5 h? The diffusion coefficient for nitrogen in iron at 700°C is 4.1 x 10-10 m²/s. 1.7 z erf(z) 0.00 0.0000 0.025 0.0282 0.05 0.0564 0.10 0.1125 0.15 0.1680 0.20 0.2227 0.25 0.2763 0.30 0.3286 0.35 0.3794 0.40 0.4284 0.45 0.4755 0.50...
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...
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...
please answer highlighted part only and detailedely thank you compare and co describe one industrial application...
please answer highlighted part only and detailedely thank
you
compare and co describe one industrial application in which steady state diffusion plays an important role, use sketches as needed; (c) An FCC iron-carbon alloy initially containing 0.22 wt% carbon is carburized at an elevated temperature and in an atmosphere wherein the surface carbon concentration is maintained at 1.1 wt% carbon. If after 50.0 hours the concentration of carbon is 0.47 wt% at a position 2.2 mm below the surface, determine...
Nitrogen from a gaseous phase
is to be diffused into pure iron at 700°C. If the surface
concentration is maintained at 0.12 wt% N, what will be the
concentration (in weight percent) 3.7 mm from the surface after 8.3
h? The diffusion coefficient for nitrogen in iron at 700°C is 3.0 ×
10-10 m2/s.
Also, A cylindrical specimen of a brass alloy 10.1 mm (0.3976
in.) in diameter and 119.8 mm (4.717 in.) long is pulled in tension
with a...
Please answer all the three questions.. Please please
7. (8 points) Carburization is an industrial process to harden steel components through diffusion. It is done at elevated temperature because a. Steels have high yield strength b. Catoms can penetrate into the component's surface through vacancy diffusion c. Catoms can penetrate into the component's surface through interstitial diffusion d. Diffusivity is high at elevated temperature 8. (15 Points) The bonding energy Ex between two atoms is a function of interatomic distance...
No. 5 (20 points) (a) Determine the time necessary to achieve a carbon concentration of 0.30 wt.% at a position of 4 mm into an iron-carbon alloy that initially contains 0.10 wt. % C. The surface concentration is to be maintained at 0.90 wt.% C, and the diffusion coefficient of C is 7.0 x 10-11 m2/sec. (10 points) (b) The diffusion coefficient of Ni in a stainless steel (fcc) is 1 x 1022 m2/sec at 500°C and 1 x 10-15...
Niobium forms a substitutional solid solution with vanadium. Compute the weight percent of niobium that must be added to vanadium to yield an alloy that contains 1.55 times 10%22 Nb atoms per cubic centimeter. The densities of pure Nb and V are 8.57 and 6.10 g/cm^3, respectively. Gold forms a substitutional solid solution with silver. Compute the number of gold atoms per cubic centimeter for a silver-gold alloy that contains 10 wt% Au and 90 wt% Ag. The densities of...
UTVER VIS Concentration of Nitrogen (wt%): = 0.21 Position in mm= 7.2 Diffusion Coefficient for Nitrogen in Iron at 700°C -8.90E-10 Nitrogen in Iron Heat Treatment Time (hours): = 8 Carburizing Time (hrs): = 7 Steel Alloy Case Depth (mm): 4.8 Steel Alloy New Case Depth (mm) - 9.9 Activation Energy kJ/mol: = 103 Temperature for Problem 3 (Celsius) -809 . Data for Problem 4 Temperature in C: -595 Diffusivity (m2/s) = 5.62E-14 Temperature in C: -702 Diffusivity (m /s)...
Nitrogen from a gaseous phase is to be diffused into pure iron at 700°C. If the surface concentration is maintained at 0.12 wt% N, what will be the concentration (in weight percent) 3.9 mm from the surface after 6.5 h? The diffusion coefficient for nitrogen in iron at 700°C is 4.1 x 10-10 m²/s. 1.7 z erf(z) 0.00 0.0000 0.025 0.0282 0.05 0.0564 0.10 0.1125 0.15 0.1680 0.20 0.2227 0.25 0.2763 0.30 0.3286 0.35 0.3794 0.40 0.4284 0.45 0.4755 0.50...
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...
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...
please answer highlighted part only and detailedely thank
you
compare and co describe one industrial application in which steady state diffusion plays an important role, use sketches as needed; (c) An FCC iron-carbon alloy initially containing 0.22 wt% carbon is carburized at an elevated temperature and in an atmosphere wherein the surface carbon concentration is maintained at 1.1 wt% carbon. If after 50.0 hours the concentration of carbon is 0.47 wt% at a position 2.2 mm below the surface, determine...
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