Experimental Study of Residual Stresses Due to Inconel X-750 Creep-feed Grinding by the Electropolishing Layer Removal Technique

Abstract

Creep-feed grinding is an accurate and efficient machining method. In this study, the effects of the cooling condition on surface residual stresses distribution in the creep-feed grinding of Inconel X-750 superalloy have been experimentally investigated. Some test samples were prepared and subjected to creep-feed grinding with dry and flood grinding at different flow rates. The variation of residual stresses in depth was obtained by the electropolishing layer removal technique. Results were shown highest creep-feed grinding forces were developed in dry grinding condition and these forces were declined by increasing the coolant quantity. According to results, by increasing about 71% of fluid flow under flood cooling, the normal and tangential forces decreased by roughly 30%. The results also demonstrated that the measured residual stresses on creep-feed grinded specimens are in the tensile form and using the coolant led to an overwhelming decrease in magnitude and depth of penetration of these stresses.

Keywords

• residual stress
• measurement
• creep-feed grinding
• electro polishing
• layer removal