On the Depth of Subsurface Plastic Deformation Produced by Peripheral Milling Operation

Abstract

A mechanism of surface and sub-surface plastic deformation in peripheral milling operation was proposed in this work. Experimental analysis was performed to evaluate the depth of sub-surface plastic deformation beneath the milled surface and the variables affecting it during machining AISI 1020 carbon steel. The depth of sub-surface plastic deformation was found to be a function of the cutting speed and feed rate while its value is not influenced by the depth of cut. The result were interpreted in terms of the thermal softening of the work material beneath the tooth tip during its engagement in cutting as well as the geometry of the peripheral milling operation.