We wish to produce an 0.3 inch plate of oxygen-free, high-conductivity (OFHC) copper that has a yield strength of at least 45 ksi and elongation of at least 10%. The original thickness of the plate is 3 inches. The width of the plate remains the same during processing. Which of the following procedures would give the correct final properties. More than one answer is possible. Group of answer choices Hot work from 3 to 0.5 inches; cold work from 0.5 to 0.3 inches Cold work from 3 to 1 inch; cold work from 1 to 0.5 inches; hot work from 0.5 to 0.3 inches Cold work from 3 to 1 inch; cold work from 1 to 0.4 inches; cold work from 0.4 to 0.3 inches Cold work from 3 to 1 inch; do full anneal; cold work from 1 to 0.5 inches; do full anneal; cold work from 0.5 to 0.3 inches Hot work from 3 to 0.4 inches; cold work from 0.4 to 0.3 inches None of the above will work Cold work from 3 to 0.3 inches Cold work from 3 to 1 inch; hot work from 1 to 0.4 inches; cold work from 0.4 to 0.3 inches Cold work from 3 to 1 inch; hot work from 1 to 0.5 inches; cold work from 0.5 to 0.3 inches Cold work from 3 to 1 inch; cold work from 1 to 0.5 inches; cold work from 0.5 to 0.3 inches Cold work from 3 to 1 inch; do full anneal; cold work from 1 to 0.4 inches; do full anneal; cold work from 0.4 to 0.3 inches Cold work from 3 to 1 inch; cold work from 1 to 0.4 inches; hot work from 0.4 to 0.3 inches

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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We wish to produce an 0.3 inch plate of oxygen-free, high-conductivity (OFHC) copper that has a yield strength of at least 45 ksi and elongation of at least 10%. The original thickness of the plate is 3 inches. The width of the plate remains the same during processing. Which of the following procedures would give the correct final properties. More than one answer is possible.

Group of answer choices

Hot work from 3 to 0.5 inches; cold work from 0.5 to 0.3 inches

Cold work from 3 to 1 inch; cold work from 1 to 0.5 inches; hot work from 0.5 to 0.3 inches

Cold work from 3 to 1 inch; cold work from 1 to 0.4 inches; cold work from 0.4 to 0.3 inches

Cold work from 3 to 1 inch; do full anneal; cold work from 1 to 0.5 inches; do full anneal; cold work from 0.5 to 0.3 inches

Hot work from 3 to 0.4 inches; cold work from 0.4 to 0.3 inches

None of the above will work

Cold work from 3 to 0.3 inches

Cold work from 3 to 1 inch; hot work from 1 to 0.4 inches; cold work from 0.4 to 0.3 inches

Cold work from 3 to 1 inch; hot work from 1 to 0.5 inches; cold work from 0.5 to 0.3 inches

Cold work from 3 to 1 inch; cold work from 1 to 0.5 inches; cold work from 0.5 to 0.3 inches

Cold work from 3 to 1 inch; do full anneal; cold work from 1 to 0.4 inches; do full anneal; cold work from 0.4 to 0.3 inches

Cold work from 3 to 1 inch; cold work from 1 to 0.4 inches; hot work from 0.4 to 0.3 inches

Tensile and Yield Strength, ksi OR % Elongation
100
90
80
70
60
50
40
30
20
10
0
0
10
Effect of Cold Work on OFHC Copper
20
Tensile Strength, ksi
30
40
Percent Cold Work
50
- Yield Strength, ksi
60
% Elongation
70
80

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