# GATE MT 2018 Q36. Consider a dilute substitutional solid solution of X in a metal A. The powder diffraction pattern of this alloy reveals that all the peaks have shifted to the left when compared to those for pure A (with no splitting of peaks). If such a solute interacts and segregates to an edge dislocation, which of the following positions around the dislocation will it preferentially occupy?

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Option D is correct

Option D is correct

See lessCorrect answer is option D. As we know, Bragg's law: 2dsin(θ)=nλ θ= sin-1(nλ/2d) As per question, θ is less, d is more d= a/√h2 +k2+l2 d∝a Compressive force is developed into the matrix region. It tries to occupy tensile region of dislocation field.

Correct answer is option D.

As we know, Bragg’s law: 2dsin(θ)=nλ

θ= sin

^{-1}(nλ/2d)As per question, θ is less, d is more

d= a/√h

^{2}+k^{2}+l^{2}d∝a

Compressive force is developed into the matrix region. It tries to occupy tensile region of dislocation field.

Option D due to compressive stress is correct

Option D due to compressive stress is correct

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