Materials Science and Engineering Properties, SI Edition
1st Edition
ISBN: 9781305178175
Author: GILMORE, Charles
Publisher: Cengage Learning
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Question
Chapter 7, Problem 1CQ
To determine
The reason for plastic strain in metals at temperature below half of melting temperature.
Expert Solution & Answer
Answer to Problem 1CQ
The motion of dislocation is the main reason for plastic strain in metals at temperature below half of melting temperature.
Explanation of Solution
Plastic strain is the strain obtained in material when the material is stretched beyond its elastic limit. Plastic strain is the permanent strain as material do not regains its original shape after the removal of force. The unloading curve on stress-strain curve follows a very different path from its original one.
The defects present in crystalline metals are the main reason for the plastic strain in them. The dislocations formed in metals during the solidification are one of the defects in it. In crystalline metals the motion of dislocation is the main reason for plastic strain in metals at temperature below half of melting temperature.
Conclusion:
Thus, motion of dislocation is the main reason for plastic strain in metals at temperature below half of melting temperature.
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Chapter 7 Solutions
Materials Science and Engineering Properties, SI Edition
Ch. 7 - Prob. 1CQCh. 7 - Prob. 2CQCh. 7 - Prob. 3CQCh. 7 - Prob. 4CQCh. 7 - Prob. 5CQCh. 7 - Prob. 6CQCh. 7 - Prob. 7CQCh. 7 - Prob. 8CQCh. 7 - Prob. 9CQCh. 7 - Prob. 10CQ
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