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

Document Type: Original Article

Authors

Mechanical Engineering Department, University of Zanjan, Iran.

10.22084/jrstan.2019.19668.1098

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


[1] S.k. Basha, M.V.J. Raju, M. Kolli, Experimental study of electrical discharge machining of inconel x-750 using tungsten-copper electrode, Materials Today Proceedings, 5(5) (2018) 11622-11627.
[2] C. Marsh, S. Depinoy, D. Kaoumi, Effect of heat treatment on the temperature dependence of the fracture behavior of x-750 alloy, Mater. Sci. Eng., A, 677 (2016) 474-484.
[3] J. Paulo Davim, V.N. Gaitonde, S.R. Karnik, Investigations into the effect of cutting conditions on surface roughness in turning of free machining steel by ANN models, J. Mater. Process. Technol., 205(1-3) (2008) 16-23.
[4] M. Liu, T. Nguyen, L. Zhang, Q. Wu, D. Sun , Effect of grinding-induced cyclic heating on the hardened layer generation in the plunge grinding of a cylindrical component, Int. J. Mach. Tools Manuf., 89 (2015) 55-63.
[5] D. Wenfeng, X. Jiuhua, C. Zhenzhen, S. Honghua, F. Yucan, Grindability and surface integrity of cast nickel-based super alloy in creep-feed grinding with brazed CBN abrasive wheels, Chin. J. Aeronaut., 23(4) (2010) 501-510.
[6] M. Gostimirović, D. Rodić, P. Kovač, D. Jesić, N. Kulundžic, Investigation of the cutting forces in creep-feed surface grinding process, J. Prod. Eng., 18(2) (2015) 21-24.
[7] M. Gostimirović, M. Sekulić, J. Kopač, P. Kovač, Optimal control of workpiece thermal state in creep-feed grinding using inverse heat conduction analysis, J. Mech. Eng., 57(10) (2011) 730-738.
[8] N.S. Rossini, M. Dassisti, K.Y. Benyounis, A.G. Olabi, Methods of measuring residual stresses in components, Mater. Des., 35 (2012) 572-588.
[9] B. Kruszyński, S. Togo, R. Wójcik, Possibility to control surface integrity in grinding, J. Manuf. Sci. Technol., 4 (1) (2003) 22-27.