Foundations of Materials Science and Engineering
6th Edition
ISBN: 9781259696558
Author: SMITH
Publisher: MCG
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Chapter 8.15, Problem 39AAP
Consider the Cu–Zn phase diagram of Figure 8.26.
- a. What is the maximum solid solubility in weight percent of Zn in Cu in the terminal solid solution α?
- b. Identify the intermediate phases in the Cu–Zn phase diagram.
- c. Identify the three-phase invariant reactions in the Cu–Zn diagram.
- i. Determine the composition and temperature coordinates of the invariant reactions.
- ii. Write the equations for the invariant reactions.
- iii. Name the invariant reactions.
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Referring to Figure 1, please answer the following [NOTE: SHOW YOUR WORK on Figure 1]:a. provide the specific name for the phase boundary lines denoted by A and B.
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Phase Diagram
A/ The lead and tin are partially dissolved in each other in solid state although they completely dissolved
in liguid state. They form eutectic from solid solutions alfa (a) and beta (B) at alloying composition 62% tin
and 38% lead, the eutectic forming temperature is 184oC. Alfa contained 20% tin dissolved in 80% lead at
1840C while beta consist of lead dissolved in tin at 1840C. If the 100 g of eutectic contained 45.5 g of alfa
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system label all phases and temperature. Show graphically the temperature of the formation of the first
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In a binary Fe-Fe3C system, what is the transformation that occurs when cooling an austenistic mixture of 2% C by weight from 1100°C to below the eutectoid temperature? What is the microstructure, and how is it formed? What are the concentrations of the total and partial phases? Data: eutectoid temperature: 723 ºC, eutectoid concentration: 0.76% C, limit concentration of ferrite: 0.022%, limit concentration of cementite: 6.7%.
Chapter 8 Solutions
Foundations of Materials Science and Engineering
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