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← ScienceWhich mechanism causes energy reduction when an ultrasonic transducer fractures crystallographically on cyclic-loading?
A)Acoustic emission damping✓
B)Increased domain wall movement
C)Ferromagnetic hysteresis declines
D)Piezoelectric charge cancellation
💡 Explanation
Acoustic emission damping causes energy reduction because micro-cracks propagate rapidly at each site, rather than ductile yield absorbing substantial energy. Because energy dissipates through high-frequency waves, therefore acoustic damping occurs rather than fracture propagating slowly through yielding.
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