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← ScienceWhich mechanism causes electron scattering in metal fatigue?
A)Crystal lattice deformation limits electron flow✓
B)Increased grain size decreases impedance
C)Oxide formation reduces conductivity
D)Thermal expansion induces surface stress
💡 Explanation
Crystal lattice deformation from cyclic stress causes electron scattering, reducing the mean free path and increasing resistivity because strain hardening introduces dislocations, therefore current flow is reduced, rather than grain size, oxide formation, or thermal stress directly hindering current flow.
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