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In coarse-grained metals, plastic deformation is mainly carried by dislocations¡ªline defects of the regular crystal lattice¡ªwithin the individual grains. Dislocations can move through the crystal grains and can interact with each other. Grain boundaries often hinder their transmission, creating a dislocation pile-up at the boundary and thereby making the material harder to deform.
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In coarse-grained metals, plastic deformation is mainly carried by dislocations¡ªline defects of the regular crystal lattice¡ªwithin the individual grains.

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