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At low temperature condition of the material, its fracture toughness decreases substantially.

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in Casting-Forming-Welding II by (119k points)
At low temperature condition of the material, its fracture toughness decreases substantially.

(a) True

(b) False

The question was asked during an online exam.

This interesting question is from Metallurgical Aspects topic in portion Mechanical Working of Metals of Casting-Forming-Welding II

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Right answer is (a) True

To explain: The fracture toughness of the material substantially decreases at low temperature. But at high or elevated temperature, the mean or average stress conditions are extremely complex because of the interactions between fatigue and environmental conditions. At high temperature, the material is plastically deformed with less force.

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