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← ScienceWhich outcome occurs when excessive stress induces deformation in crystalline structures?
A)Dislocations diminish material's mechanical strength✓
B)Grain boundaries vanish, raising conductivity
C)Atomic diffusion rate rapidly decreases
D)Debye frequency in crystal shifts downward
💡 Explanation
Increased stress causes plastic deformation through dislocation generation because these defects disrupt the crystal lattice structure, therefore reducing the force needed to induce further slip, rather than increased conductivity or diffusion, which require different conditions.
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