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← ScienceWhich mechanical consequence results when dislocations accumulate within polycrystalline material's lattice?
A)Increased material yield strength✓
B)Accelerated thermal conductivity decline
C)Enhanced piezoelectric coefficient
D)Reduced susceptibility to corrosion
💡 Explanation
Increased yield strength occurs because dislocation pile-up causes strain hardening, which impedes further plastic deformation via the dislocation _slip mechanism_. Therefore, the strength increases, rather than conductivity failing, as piezoelectricity and corrosion resistence are unrelated.
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