Homework Answers
Add Answer to:
UTVER VIS Concentration of Nitrogen (wt%): = 0.21 Position in mm= 7.2 Diffusion Coefficient for Nitrogen...
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...
2 a) It is given that a carburizing heat treatment of 10-hour duration of a steel...
2 a) It is given that a carburizing heat treatment of 10-hour duration of a steel alloy will raise the carbon content to 0.45 wt% at a point 2.5 mm away from the surface. Compute the time required to get the same concentration at a 5.0-mm position from the surface at the same carburizing temperature for an identical steel alloy (Hint: The diffusion coefficient will be a constant for two identical materials at a given temperature). b) What is the...
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.
Calculate D, diffusion coefficient in m^2/s at the soecified temperature tions Determine the carburizing time necess...
Calculate D, diffusion coefficient in m^2/s at the soecified
temperature
tions Determine the carburizing time necessary to achieve a carbon concentration of 0.47 wts at a position 2.1 mm into an iron-carbon alloy that initially contains 0.13 wt%C. The surface concentration is to be maintained at 1.1 wtC. and the treatment is to be conducted at 1180'C. Assume that Do -6,310ms and Q-113 kJ/mol. The table Tabulation of Error Function Values may be useful
Current Attempt In Progress For a steel alloy it has been determined that a carburizing heat treatment of 17...
Current Attempt In Progress For a steel alloy it has been determined that a carburizing heat treatment of 17 h duration at 700'C will raise the carbon concentration to 0.39 wt at a point 3.9 mm from the surface. Estimate the time necessary to achieve the same concentration at a 7.7 mm position for an identical steel and at a carburizing temperature of 1030°C. Assume that Dois 3.1 * 10 m/s and Q, is 103 kJ/mol. e Textbook and Media...
Determine the carburizing time necessary to achieve a carbon concentration of 0.48 wt% at a position...
Determine the carburizing time necessary to achieve a carbon concentration of 0.48 wt% at a position 3.2 mm into an iron-carbon alloy that initially contains 0.20 wt% C. The surface concentration is to be maintained at 1.0 wt% C, and the treatment is to be conducted at 1070°C. Assume that D0 = 2.2 × 10-5 m2/s and Qd = 173 kJ/mol. The following table may be useful. om Equation 6.5 calculate the Gaussian error function: erf(x2Dt) =
Find the carbon concentration which can be achieved after 19.7 h at a position 2 mm...
Find the carbon concentration which can be achieved after 19.7 h
at a position 2 mm of a
-iron/carbon alloy with initial concentration of 0.2 wt% C. The
concentration in the surface is maintained at 1.30 wt% C, and the
treatment is conducted at 1000 °C. For diffusion coefficient, use
the diffusion data for
-Fe in Table 6.2 in the textbook.
z
erf(z)
0.85
0.7707
0.90
0.7970
1) You find that carbon takes 259 s to diffuse to a concentration of 0.5 wt%...
1) You find that carbon takes 259 s to diffuse to a concentration of 0.5 wt% at a depth of 0.1 mm in BCC iron if the intitial concentration is 0.2 wt% and the surface is maintained at 1 wt% at 863 K. At temperature 888 what diffusion time will be needed? 2) You find that carbon takes 553 s to diffuse to a concentration of 0.5 wt% at a depth of 0.1 mm in BCC iron if the intitial...
3. For a steel alloy it has been determined that a carburizing heat treatment of 10...
3. For a steel alloy it has been determined that a carburizing heat treatment of 10 h duration will raise the carbon concentration to 0.45 wt% at a point 2.5 mm from the surface. Estimate the time necessary to achieve the same concentration at a 5.0 mm position for an identical steel and at the same carburizing temperature. [40]
2.4 For a steel alloy it has been determined that a carburizing heat treatment of 5-h...
2.4 For a steel alloy it has been determined that a carburizing heat treatment of 5-h duration will raise the carbon concentration to 0.45 wt% at a point 2.5 mm from the surface. Estimate the time necessary to achieve the same concentration at a 5.0-mm position for an identical steel and at the same carburizing temperature. Dt 2 2. 2. 2.
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...
2 a) It is given that a carburizing heat treatment of 10-hour duration of a steel alloy will raise the carbon content to 0.45 wt% at a point 2.5 mm away from the surface. Compute the time required to get the same concentration at a 5.0-mm position from the surface at the same carburizing temperature for an identical steel alloy (Hint: The diffusion coefficient will be a constant for two identical materials at a given temperature). b) What is the...
Calculate D, diffusion coefficient in m^2/s at the soecified
temperature
tions Determine the carburizing time necessary to achieve a carbon concentration of 0.47 wts at a position 2.1 mm into an iron-carbon alloy that initially contains 0.13 wt%C. The surface concentration is to be maintained at 1.1 wtC. and the treatment is to be conducted at 1180'C. Assume that Do -6,310ms and Q-113 kJ/mol. The table Tabulation of Error Function Values may be useful
Current Attempt In Progress For a steel alloy it has been determined that a carburizing heat treatment of 17 h duration at 700'C will raise the carbon concentration to 0.39 wt at a point 3.9 mm from the surface. Estimate the time necessary to achieve the same concentration at a 7.7 mm position for an identical steel and at a carburizing temperature of 1030°C. Assume that Dois 3.1 * 10 m/s and Q, is 103 kJ/mol. e Textbook and Media...
Find the carbon concentration which can be achieved after 19.7 h
at a position 2 mm of a
-iron/carbon alloy with initial concentration of 0.2 wt% C. The
concentration in the surface is maintained at 1.30 wt% C, and the
treatment is conducted at 1000 °C. For diffusion coefficient, use
the diffusion data for
-Fe in Table 6.2 in the textbook.
z
erf(z)
0.85
0.7707
0.90
0.7970
3. For a steel alloy it has been determined that a carburizing heat treatment of 10 h duration will raise the carbon concentration to 0.45 wt% at a point 2.5 mm from the surface. Estimate the time necessary to achieve the same concentration at a 5.0 mm position for an identical steel and at the same carburizing temperature. [40]
2.4 For a steel alloy it has been determined that a carburizing heat treatment of 5-h duration will raise the carbon concentration to 0.45 wt% at a point 2.5 mm from the surface. Estimate the time necessary to achieve the same concentration at a 5.0-mm position for an identical steel and at the same carburizing temperature. Dt 2 2. 2. 2.
Most questions answered within 3 hours.
-
An object in front of a concave mirror has a real image that is
11.5 cm...
asked 6 minutes ago -
Consider the reaction, C3 H8 + O2 --> CO2 + H2O. How many
moles of O2...
asked 1 hour ago -
You and your opponent both roll a fair die. If you both roll the
same number,...
asked 2 hours ago -
In a study of the accuracy of fast food drive-through orders,
Restaurant A had 257 accurate...
asked 2 hours ago -
Identify and describe in detail the four categories of
institutions that could be included in a...
asked 2 hours ago -
In python
class Customer:
def __init__(self, customer_id, last_name, first_name, phone_number, address):
self._customer_id = int(customer_id)
self._last_name =...
asked 2 hours ago -
What is an example of a limitation in implementing a new
ERP system and how it...
asked 2 hours ago -
In a section of 9.7cm of an artery with a radius of 2.6mm there
is a...
asked 2 hours ago -
the two carboxylic acid groups of aspartic acid have different
acidities with pKa values of 2.1...
asked 2 hours ago -
Would CuCO3 aqueous salt combined with calcium chloride
form a solid precipitate? If so, what would...
asked 2 hours ago -
How do ECM Solutions assist in embedding a culture of continuous
improvement in an organization? (Project...
asked 2 hours ago -
Directions
These directions introduce the idea of Essential Questions.
Since this may be a new concept...
asked 2 hours ago