Abstract
Metallographic techniques have been used to determine the influence of abrasive grit morphology on the introduction of deformed surface layers into a workpiece of 70:30 brass. The abrasive grit morphology at the periphery of grinding wheels was initially characterized by examination of the wheels within a scanning electron microscope and single grits were then chosen to represent these morphologies in single-grit grinding experiments. It was found that the extent of the deformed layers depended on the form of the grit as well as its rake angle, grinding speed and depth of cut. This information was used to interpret the deformed surface layers observed under practical grinding conditions. A mechanism involving redeposition of metal back onto the ground surface is proposed to account for the poor surface finishes observed.
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