Degarmo's Materials And Processes In Manufacturing
13th Edition
ISBN: 9781119492825
Author: Black, J. Temple, Kohser, Ronald A., Author.
Publisher: Wiley,
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Chapter 4, Problem 26RQ
To determine
The stoichiometric intermetallic compounds and the appearance of both stoichiometric and non-stoichiometric compounds in temperature- composition phase diagram.
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For a 76 wt% Pb–24 wt% Mg alloy, make schematic sketches of the microstructure that would be observed for conditions of very slow cooling at the following temperatures: 575°C, 500°C, 450°C, and 300°C. Label all phases and indicate their approximate compositions.
BI (a) Figure BI below shows the equilibrium phase diagram of hypothetical A - B alloy system.
Answer the following questions.
What are technical names of Line A and Line B? What do they signify?
(i)
(ii) With the aid sketches, portray the microstructures and phases that are present for the
20wt%A-80wt%B alloy (Alloy A) at the temperatures of 780 °C, 670 °C, 652 °C, and 500
°C, respectively.
(iii) Assume an A - B alloy (Alloy B) has 60wt%a - 40wt%L, in terms of weight, at a
temperature of 652 °C. Determine the overall composition of Alloy B.
(o) emai
700
8 600
500
400
800
0
A
760 °C
Line B
W
a /9.5
20
Line A
a + L
650 °C
40
Liquid (L)
wt%B
Figure B1
52.5
a + ß
60
B+L
80
93.7 B
100
B
9.43 For a 76 wt% Pb-24 wt% Mg alloy, make sche-
● matic sketches of the microstructure that would
be observed for conditions of very slow cooling
at the following temperatures: 575°C (1070°F),
500°C (930°F), 450°C (840°F), and 300°C (570°F).
Label all phases and indicate their approximate
compositions.
Chapter 4 Solutions
Degarmo's Materials And Processes In Manufacturing
Ch. 4 - What kind of questions can be answered by...Ch. 4 - Prob. 2RQCh. 4 - Supplement the examples provided in the text with...Ch. 4 - Prob. 4RQCh. 4 - What three primary variables are generally...Ch. 4 - Use the pressure–temperature diagram for water...Ch. 4 - Prob. 7RQCh. 4 - What form of equilibrium phase diagram is most...Ch. 4 - What is a cooling curve?Ch. 4 - Prob. 10RQ
Ch. 4 - Prob. 11RQCh. 4 - Prob. 12RQCh. 4 - Prob. 13RQCh. 4 - What types of changes occur upon cooling through a...Ch. 4 - Prob. 15RQCh. 4 - What is a tie�line? For what types of phase...Ch. 4 - What points on a tie�line are used to determine...Ch. 4 - Prob. 18RQCh. 4 - What is a cored structure? Under what conditions...Ch. 4 - What is the difference between a cored structure...Ch. 4 - Prob. 21RQCh. 4 - Prob. 22RQCh. 4 - Prob. 23RQCh. 4 - Prob. 24RQCh. 4 - For the various three�phase reactions, what does...Ch. 4 - Prob. 26RQCh. 4 - Prob. 27RQCh. 4 - Prob. 28RQCh. 4 - Prob. 29RQCh. 4 - Prob. 30RQCh. 4 - Prob. 31RQCh. 4 - Prob. 32RQCh. 4 - Prob. 33RQCh. 4 - Prob. 34RQCh. 4 - Prob. 35RQCh. 4 - Prob. 36RQCh. 4 - Prob. 37RQCh. 4 - What is carbon equivalent, and how is it computed?Ch. 4 - Prob. 39RQCh. 4 - Prob. 40RQCh. 4 - Prob. 1PCh. 4 - Prob. 2PCh. 4 - Prob. 3PCh. 4 - Consider the manufacture of a fishhook beginning...Ch. 4 - If a stainless steel were to be used, what type of...Ch. 4 - A wide spectrum of coatings and surface treatments...Ch. 4 - Prob. 1.4CSCh. 4 - Prob. 2.1CSCh. 4 - Prob. 2.2CSCh. 4 - Prob. 2.3CSCh. 4 - Prob. 2.4CS
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