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← TechnologyWhich consequence results when excessive force during CNC lathe tool-path planning for an aluminum alloy?
A)Chatter vibration increases surface roughness✓
B)Built-up edge reduces tool wear
C)Thermal expansion reduces accuracy
D)Work hardening raises yield strength
💡 Explanation
Chatter induced vibration markedly impairs surface finish because self-excited oscillation, a form of **mechanical resonance**, destabilizes the cutting process and causes it to leave unwanted marks. Therefore, surface roughness increases rather than improves; different excitation modes would give alternate results.
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