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The rate of crack propagation in brittle fracture is _______

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The rate of crack propagation in brittle fracture is _______

(a) Nonexistent

(b) Slow

(c) Rapid

(d) Random

The question was asked during a job interview.

My question is based upon Fracture Toughness, Protection against Fracture topic in chapter Imperfection in Metal Crystals, Fracture, Corrosion and Oxidation of Engineering Material & Metallurgy

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The correct option is (c) Rapid

Explanation: Brittle fracture occurs at a point where microcracks are more in number. Here, the rate of crack propagation is rapid. On the other hand, the rate of crack propagation in ductile materials is slow.

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