What is the effect of grain boundaries on dislocation movement In materials?

Question added by aminu salifu , Production operations (expatrait) , ma'aden aluminium company
Date Posted: 2015/05/16

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by Kamaluddin Syed , Professor and Head , Vignan's Institute of Information Technology

Dislocations cannot cross grain boundaries due to non -crystallinity and therefore shear strength increases. Even pinning may occur if precipiates exist at grain boundaries.

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