
(a)
Interpretation:
The draw force needs to be calculated considering no friction of copper wire.
Concept Introduction:
Cold working is the

Answer to Problem 8.53P
The draw force required for original copper wire is 6096.65 N.
Explanation of Solution
Given Information:
1 inch = 2.54 cm
% cold work is given by the following relation:
Here,
Equation (1) becomes,
Thus at 30.56 % cold work from the graph yield strength of copper = 138 MPa.
Now, drag force (F) is calculated from the following formula,
Here,
Equation (2) becomes,
(b)
Interpretation:
Whether the drawn wire break in the drawing wire or not needs to be determined.
Concept Introduction:
Cold working is the mechanical process in which matrial is plastically deformed under recrystallization temperature.

Answer to Problem 8.53P
The stress after the wire is drawn under cold work is 198.71MPa which is less than actual yield strength 370MP. Hence wire will not break.
Explanation of Solution
Given Information:
1 inch = 2.54 cm
Thus drag force F of wire of copper is 6096.65 N
Final diameter = 0.625 cm
The stress (s) on the wire after cold work is given by the following relation:
Yield strength material will not break.
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Chapter 8 Solutions
Essentials of Materials Science and Engineering, SI Edition
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