Chip formation of nickel-based superalloy in high speed grinding with single diamond grit
by Zhenzhen Chen; Lin Tian; Yucan Fu; Jiuhua Xu; Wenfeng Ding; Honghua Su
International Journal of Abrasive Technology (IJAT), Vol. 5, No. 2, 2012

Abstract: In order to understand chip formation mechanism during high speed grinding of nickel-based superalloy, grinding tests with single brazed diamond grit were performed with the wheel speed from 20 m/s to 150 m/s. The kinematic grit trace was geometrically optimised to meet the requirement of the real grinding process. The maximum undeformed chip thickness was kept at 1 µm. Grooves and chips were observed and analysed by means of optical microscope and scanning electron microscope. The results obtained showed that, when the wheel speed was below 60 m/s, the serrated behaviour of the chips was not obvious. However, the typical serrated behaviour took place on the free surface in case of the wheel speed of above 60 m/s. The frequency of the chip segmentation was increased linearly with the increasing grinding speed from 60 m/s to 150 m/s.

Online publication date: Wed, 30-Jul-2014

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