Foundations of Materials Science and Engineering
6th Edition
ISBN: 9781259696558
Author: SMITH
Publisher: MCG
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Chapter 8.15, Problem 41AAP
Consider the nickel–vanadium phase diagram of Figure P8.41.
- a. What is the maximum solid solubility of V in Ni while maintaining a single phase?
- b. At what temperature does the maximum solid solubility take place?
- c. Identify as many intermediate phases as you can.
- d. Identify at least one invariant reaction and provide as much information as possible for the reaction.
Figure P8.41
Nickel–vanadium phase diagram.
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(c)
Suppose an alloy consists of a 75 wt% Sn-25 wt% Pb.
i.
List the phases present in the alloy at 185 °C.
ii.
Determine the composition of the phases present in (i).
Calculate the relative amount of each phase present at 183 °C in terms of the mass
iii.
fraction.
iv.
Sketch with labels the microstructure of the alloy at the temperature of 183 °C -
AT.
Q1 / Two metals Beryllium (Be) and Silicon (Si) have melting points 1282°C and 1414 °C
respectively, are completely soluble as liquids but completely insoluble as solids . They form a
eutectic at 1090°C containing 61 wt% Si -39wt% Be?
Determine the following:-
1- Draw the thermal equilibrium phase diagram and identify all phases are present in
diagram ,then sketches what happens in microstructure when the alloys containing , a-
10wt% Si, b-70wt%Si , solidify completely.
2- Determine the composition and the amount of each phase for the alloy which contain 15
wt% Si-85wt% Be at 1150°C If the alloy is hypoeutectic
determine the amount of eutectic at 600 °C?
or hypereutectic and
Question:
Construct the hypothetical phase diagram for metals A and B between room temperature (20°C) and 700°C given the following information:
The melting temperature of metal A is 480°C.
The maximum solubility of B in A is 4 wt% B, which occurs at 420°C.
The solubility of B in A at room temperature is 0 wt% B.
One eutectic occurs at 420°C and 18 wt% B–82 wt% A.
A second eutectic occurs at 475°C and 42 wt% B–58 wt% A.
The intermetallic compound AB exists at a composition of 30 wt% B–70 wt% A, and melts congruently at 525°C.
The melting temperature of metal B is 600°C.
The maximum solubility of A in B is 13 wt% A, which occurs at 475°C.
● The solubility of A in B at room temperature is 3 wt% A.
Chapter 8 Solutions
Foundations of Materials Science and Engineering
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