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← TechnologyWhich deformation results when chatter occurs during lathe cutting?
A)Harmonic surface waviness appears✓
B)Workpiece undergoes brittle fracture
C)Tool experiences plastic yielding
D)Thermal expansion causes runout
💡 Explanation
Harmonic waviness emerges because self-excited vibration induces the regenerative chatter mechanism. These cyclical cutting force variations imprint repeating patterns rather than brittle fracture. Therefore, the surface shows waviness rather than cracking because stability deteriorates under specific conditions.
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