Concept explainers
The expected concentration of nitrogen
Answer to Problem 4.22P
The concentration of nitrogen in BCC iron at
Explanation of Solution
Given:
The surface concentration of nitrogen is
The temperature is
The time is
Formula used:
The diffusion coefficient for nitrogen diffusion into BCC iron is given by,
Here,
The expression to find the concentration of nitrogen in BCC iron is given by,
Here,
The value of
The formula to convert degree Celsius to Kelvin is given by,
Here,
The relation between
Here,
Calculation:
The temperature in Kelvin is calculated as,
Substitute
From pre exponential constant table the value for nitrogen in BCC iron is
The diffusion coefficient for nitrogen diffusion into BCC iron is calculated as,
Substitute
The
Substitute
The error value of
Substitute
The concentration of nitrogen in BCC iron at
Substitute
Conclusion:
Therefore, the concentration of nitrogen in BCC iron at
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Chapter 4 Solutions
Materials Science And Engineering Properties
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- Materials Science And Engineering PropertiesCivil EngineeringISBN:9781111988609Author:Charles GilmorePublisher:Cengage Learning