In ultrasonic machining process, the material removal rate will be hig

1.	In ultrasonic machining process, the material removal rate will be higher for material with
A.	higher toughness
B.	higher ductility
C.	lower toughness
D.	higher fracture strain
Answer» D. higher fracture strain

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In ultrasonic machining process, the material removal rate will be higher for material with

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