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← ScienceWhich consequence results when strain exceeds yield around lattice defects?
A)Increased dislocation pile-up at grain boundaries✓
B)Enhanced electron mobility in conduction band
C)Reduced phonon scattering at interfaces
D)Suppressed Schottky barrier junction formation
💡 Explanation
Plastic deformation occurs due to dislocation motion. The mechanism is dislocation pile-up, because strain hardening raises the yield threshold; therefore deformation accelerates rather than uniformly dispersing, resulting from immobile grain boundaries.
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