The material removal rate will be higher in ultrasonic machining process for materials with

Explanation:

Ultrasonic Machining:

• In ultrasonic machining, a tool of the desired shape vibrates at an ultrasonic frequency with an amplitude of around 15 – 50 μm over the workpiece.
• In this machining generally, the tool is pressed downward with a feed force, F.
• Between the tool and workpiece, the machining zone is flooded with hard abrasive particles generally in the form of a water-based slurry.
• As the tool vibrates over the workpiece, the abrasive particles act as the indenters and indent both the work material and the tool. The abrasive particles, as they indent, the work material, would remove the same, particularly if the work material is brittle, due to crack initiation, propagation and brittle fracture of the material.
• It is typically used on brittle materials as well as materials with a high hardness due to microcracking mechanics. If the material has lower toughness then it will undergo brittle fracture and the material removal rate will be higher.