Foundations of Materials Science and Engineering
6th Edition
ISBN: 9781259696558
Author: SMITH
Publisher: MCG
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Textbook Question
Chapter 8.15, Problem 1KCP
Define (a) a phase in a material and (b) a phase diagram.
(a)
Expert Solution
To determine
A phase in a material.
Explanation of Solution
Phase refers to the physical similarity and difference among the regions of a material. Phase in a material is a portion or area that contrasts in its microstructure and composition from another portion or area of the same material.
(b)
Expert Solution
To determine
A phase diagram.
Explanation of Solution
A phase diagram refers to the graphical or pictorial representation of various phases exists in a material system at different temperatures, pressures, structures and compositions. It is constructed by using conditions of equilibrium. Large number of phase diagrams constructed in temperature versus composition plot.
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BINARY PHASE DIAGRAMS
Please only answer parts d and e as the rest have been solved.
Show full detailed explanation to answers with diagrams if necessary a)(i) What is the melting point of pure Mg?(ii) What is the maximum solubility of Mg in Pb and at what temperaturedoes this occur?
(b) A 50 wt.% Pb-50wt% Mg alloy is slowly cooled from 700 °C to 400 °C.(i) At what temperature does the first solid phase form?(ii) What is the composition of this solid phase?(iii) At what temperature does all the liquid solidify?(iv) What is the composition of the last remaining liquid phase?(v) What is the freezing range? (c) What is the mass fraction of solid and liquid of a 60 wt.% Mg alloy at atemperature of 500 °C.(d) Draw and label the microstructure of an 80 wt.% Mg alloy at 600 °C.(e) A Mg-Pb alloy of mass 5.5 kg has a composition just slightly below thesolubility limit of 200 °C.(i) What mass of lead is in the alloy?(ii) If the alloy is heated to 350 °C how much more lead can be dissolvedin…
1) Given the following information construct a hypothetical phase diagram formetals A and B between the temperatures of 400 and 800 o C given the followinginformation The two end member components are A and B The bottom axis should given in mol% B with 100 mol% B being on the right sideof the diagram. The melting temperature of metal A is 750 o C. The melting temperature of metal B is 700 o C. One eutectic occurs at 600 o C and 75 mol% B. The maximum solubility of A in B is 15 mol% A, and occurs 600 o C.The maximum solubility of B in A is 10 mol% B and occurs 600 o C.
2) Label all regions on the phase diagram
3) Sketch representations of the equilibrium microstructures for the phase diagramabove, for an A-B alloy of the eutectic composition at 750 and 500 o C
Please help
Chapter 8 Solutions
Foundations of Materials Science and Engineering
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