(a)
Interpretation:
The dendritic fraction of iron metal at
Concept Introduction:
Dendritic solidification is the process in which a liquid having lack of nucleating properties are undercooled to solidify the liquid.
A dendritic fraction is given by the following relation:
Answer to Problem 9.38P
Dendritic fraction of iron metal at
Explanation of Solution
Given Information:
Undercooling temperature
Calculation:
A dendritic fraction is given by the following relation:
Here,
But
Equation (1)becomes,
Therefore dendritic fraction of iron nucleates at
(b)
Interpretation:
Thedendritic fraction of iron nucleates at
Concept Introduction:
Dendritic solidification is the process in which a liquid having lack of nucleating properties are undercooled to solidify the liquid.
A dendritic fraction is given by the following relation:
Answer to Problem 9.38P
The dendritic fraction of iron nucleates at
Explanation of Solution
Given Information:
Undercooling temperature
Specific heat of iron =
Calculation:
A dendritic fraction is given by the following relation:
Here,
But latent of fusion as per general latent heat of fusion for all metals is
Equation (1) becomes,
Thus, the dendritic fraction of iron nucleates is 0.333.
(c)
Interpretation:
The dendritic fraction of homogenous iron nucleatewith specific heat of iron metal equals to
Concept Introduction:
Homogeneous iron nucleate is the subcontains that are added in iron nucleates such as silicon tungsten, cobalt, zirconium is an equal proportion.
Answer to Problem 9.38P
The dendritic fraction of iron nucleates for homogeneous nucleation is 1.4, as dendritic fraction becomes greater than one, it indicates the pure solidification.
Explanation of Solution
Given Information:
Specific of iron nucleates =
Calculation:
Equation for dendritic fraction is as follow:
Here,
But at homogeneous nucleation of iron nucleates,
(From latent heat table)
Equation (1) becomes,
The dendritic fraction of iron nucleates at homogeneity is 1.4.
As F>1, pure solidification of iron nucleates formed.
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Chapter 9 Solutions
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