Loss of stress with time at constant strain in steel is called as-
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A.
Ductility
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B.
Relaxation
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C.
Creep
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D.
Shrinkage
Correct Answer:
B. Relaxation
Explanation:
The loss of stress over time in steel while the strain remains constant is defined as relaxation. This occurs as internal molecular rearrangements allow the material to reach a lower energy state, causing a gradual decay in the force required to maintain its stretched length. In contrast, creep refers to the increase in deformation under a constant load, while shrinkage involves volume reduction due to moisture loss. Therefore, the correct answer is Relaxation.
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