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In screw dislocation, the Burger’s vector lies _________ to the dislocation line.

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In screw dislocation, the Burger’s vector lies _________ to the dislocation line.

(a) Perpendicular

(b) Parallel

(c) At an angle

(d) Sideways

I have been asked this question in examination.

Enquiry is from Crystal Defects in division Imperfection in Metal Crystals, Fracture, Corrosion and Oxidation of Engineering Material & Metallurgy

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Correct option is (b) Parallel

Explanation: The Burger’s vector in screw dislocation lies parallel to the dislocation line along the axis of a line of atoms in the same plane. On the other hand, it lies at an angle for edge dislocation.

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