Tool wear on nickel alloys with different coolant pressures: Comparison of Alloy 718 and Waspaloy

Currently, Inconel 718 and Waspalloy are common alloys in the machining of aeroengine components. The former is more known than the latter, so the comparison of tool wear patterns at different coolant pressures can be very significant, and with direct application to real production and research. In both alloys the grain size is key f for the flank and notch wear appearance and successive growth. In the work here presented, results of face-turning testing for both cases are summarized, using cooling at 6 (conventional) and 80 bar. In short, large grain alloy structure leads to higher notch wear, whereas the smaller grain one leads to higher flank wear. However behaviors of both alloys are different in relation to pressure value. Different insert nose wear patterns ere also found, worse in the case of Waspalloy.