Surface Roughness Improvement by Removal of Recast Layer on Wire Electrical Discharge Machined Surface Through Abrasive Flow Finishing Machine
Wire electrode discharge machining (WEDM) is a widely accepted process for machining of precision and complex geometry. Generally the spark produced during the WEDM process on the workpiece surfaces forms a layer of recast. It is one of the challenging aspects to remove this recast layer from a complex surface. The present research investigates the removal of WEDM recast layer and surface roughness improvement on the components having internal complex geometry on stainless steel (SS 410) material. The study also explores the effect of abrasive flow finishing for multiple components by stacking parallel to each other for simultaneous finishing through suitable fixture. The featuring of WEDM machined surface before and after AFFM process is examined through scanning electron microscope (SEM). Additionally, EDS reveals the noticeable amount of electrode material deposited on the component, which is removed after AFFM. The improvement in the surface roughness has been also noticed through surface roughness tester, Form Talysurf.
KeywordsEDM recast layer Abrasive flow finishing machine (AFFM) Surface roughness SEM analysis EDS
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