| Abstract: | The residual stress distribution in the surface region of workpieces of a bearing bronze that is machined under unlubricated, orthogonal conditions is determined using a deflection etching technique. The residual stress at the surface is low (compressive) and increases with an increase in depth beneath the machined surface to a maximum (tensile) then decreases continuously with a further increase in depth eventually becoming vanishingly small. The peak residual stress and depth of the stressed region increase with an increase in cutting speed, an increase in feed rate and an increase in tool rake angle but are independent of tool wear land length. The results of the investigation are interpreted qualitatively in terms of the type of chip produced and the variation of the thickness of the deformed surface region with cutting conditions. |
