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In plastic deformation of metal, the metal strength decreases as the increase in its temperature.

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in Casting-Forming-Welding II by (119k points)
In plastic deformation of metal, the metal strength decreases as the increase in its temperature.

(a) True

(b) False

This question was posed to me in exam.

This intriguing question originated from Plastic Deformation and Yield Criteria in section Types of Die & Metal Forming Processes of Casting-Forming-Welding II

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The correct choice is (a) True

Easiest explanation: In plastic deformation of metal, its strength decreases when the temperature is increased. The plasticity of material is better when the deformation temperature is greater than the re-crystallization temperature but should be below the melting point. Re-crystallization temperature is the temperature at which the metal shows enough plasticity for efficient deformation.

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