Material removal mechanism of two-dimensional ultrasonic vibration assisted polishing Inconel718 nickel-based alloy

Abstract

In this paper, a two-dimensional ultrasonic-assisted polishing Inconel718 nickel-based alloy has been investigated. This polishing technique combines the functions of ultrasonic machining and conventional mechanical polishing, which improves the material removal rate (MRR) of the Inconel718 nickel-based alloy by nearly two times (from 220 nm/min to 415 nm/min), and the surface roughness and average standard deviation of the roughness values are significantly reduced. The MRR model of two-dimensional ultrasonic-assisted polishing Inconel718 nickel-based alloy was established by analyzing the mechanism of material removal and the movement of abrasive grains, including the polishing pad material and properties, abrasive particle size and ultrasonic vibration frequency and amplitude and other related polishing process parameters. The experimental results show that the MRR prediction model of ultrasonic-assisted polishing material has a good consistency with the experimental results. The model can be used to predict and guide the two-dimensional ultrasonic-assisted polishing process of Inconel718.