In this process, material removal takes place due to tiny brittle fracture of metallic layer with high velocity impact of abrasive particles. Therefore, this method of machining is more suitable for brittle materials. A high velocity jet of dry air, CO2 or nitrogen gas containing abrasive particles strikes the workpiece at the point where cutting or machining is desired. These gases are carrier medium for abrasives Al2O3, SiC, boron carbide, and diamond (generally used as abrasives). Abrasives’ sizes may range from 10 to 50 μm, and jet velocity ranges from 150 to 300 m/s. The gap between nozzle tip and work surface is kept about 1 mm. A conceptual diagram for AJM is shown in Figure 23.1.
Figure 23.1 A Conceptual Diagram for AJM
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