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← ScienceWhich consequence occurs when defects concentrate in a crystal lattice?
A)Reduced mechanical yield strength✓
B)Increased thermal conductivity
C)Enhanced electrical conductivity
D)Lowered melting point greatly
💡 Explanation
Local dislocation pile-up causes reduced mechanical yield strength because dislocation motion impedes plastic deformation via dislocation blocking; therefore, the material weakens rather than getting stronger because dislocation movement is severely restricted.
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