Optimization of Micro Hardness of Finished Surface in Spark Assisted Abrasive Flow Machining

Finishing is the prime requirement for the better functional performance and longer life cycle of the product. A single scratch over the surface may cause the failure of the component. This required development of such a process, which can provide better surface finish to the complex geometries, economically. Abrasive Flow Machining is a non conventional technique used for the finishing of critical shaped geometries, which cannot be obtained through the conventional techniques. Spark assisted Abrasive Flow Machining is the hybrid form of Abrasive Flow Machining which enhances the micro hardness of the finished surface and providing better strength to the component. The present paper used L9 OA for the optimization of the micro hardness of surface finished through spark assisted Abrasive Flow Machining. The effect of parameters such as current, duty cycle and extrusion pressure was studied for the micro hardness of finished surface.