In-process detection of surface porosity in machined castings

Surface porosity is a common problem encountered while machining castings that contain volume porosity in the immediate subsurface. Consequent to the removal of the outer layer of the workpiece during machining, porosity that was hitherto latent in the component volume gets exposed on the generated surface in the form of a cavity. Such porosity is detrimental to the function and performance of the component with adverse cost and quality …