Abstract
Grinding industry needs a fast, reliable and non-destructive inspection tool to detect the grinding damage at the rate of production. Barkhausen emission is shown to be effective for this purpose. In this investigation, a varying amount of surface damage was induced in the ground steels by changing the coolant flow rate during grinding. The Barkhausen effect signal emitted from the surface of these steel samples correlated well with the coolant flow rate. The samples were further analyzed for grinding damage, namely residual stress and micro-hardness, using conventional methods, X-ray and micro-hardness tester. A consistent change in the Barkhausen effect signal was observed with the changes in residual stress and micro-hardness. It appears that the Barkhausen technique could be a viable technique to detect the degree of grinding damage in steel components at a rate fast enough to match the production rate.
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