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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How can we Interpret a Phase Diagram?
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
Which line on the above phase diagram corresponds to the Solid-Liquid transition?
Answer
Chapter 8 Solutions
Foundations of Materials Science and Engineering
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