A dislocation line in a fcc crystal dissociates into two partials which have their Burger vectors as a6[ 2overline 1 overline 1 ] and a6[ 11overline 2 ], Indicate the correct statement.

Burgers vector of the undissociated dislocation line is a2[ 10overline 1 ]

This question belongs to Metallurgical Engineering Physics Of Metals In Metallurgy

Physics of Metals in Metallurgy

A dislocation line in a fcc crystal dissociates into two partials which have their Burger vectors as $$\frac{a}{6}\left[ {2\overline 1 \overline 1 } \right]$$ and $$\frac{a}{6}\left[ {11\overline 2 } \right],$$ Indicate the correct statement.

A) Burgers vector of the undissociated dislocation line is $$\frac{a}{2}\left[ {10\overline 1 } \right]$$ B) Burgers vector of the undissociated dislocation line is $$\frac{a}{2}\left[ {1\overline 1 0} \right]$$ C) Energy of each partial is proportional to $$\frac{{{a^2}}}{3}$$ D) Energy of the undissociated dislocation line is lesser than the sum of energy of two partials

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Correct Answer: Option A

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A dislocation line in a fcc crystal dissociates into two partials...

A dislocation line in a fcc crystal dissociates into two partials which have their Burger vectors as $$\frac{a}{6}\left[ {2\overline 1 \overline 1 } \right]$$ and $$\frac{a}{6}\left[ {11\overline 2 } \right],$$ Indicate the correct statement.

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