Experimental investigation of surface morphological changes during end milling of nimonic 263

Abstract

Machining of Nickel - cobalt alloy is a challenging task and it is responsible for a significant contribution on intrinsic properties such as wear resistance, etc. Performing machining processes with better surface and metrological properties will reduce the total cost consumption in aerospace sector. In this study, the surfaces of end milled nimonic 263 have been analysed through optical 3D profilometer to investigate the changes in the surface characteristics such as surface roughness, surface texture and surface morphology, etc. The machining (SPD) has been done using vertical machining center with the help of tungsten carbide tool coated with TiAlN. Quantifiable contributions of tool nomenclature and the machining parameters on characteristics of machined sample are evaluated. It is found that, the behavioural changes during end milling have great impact and influence on surface characteristics. Additionally, it has been observed that there is an existence of correlation between the parameters of surface roughness such as Ssk, Sku, etc and the quantitative contributions of tool nomenclature and machining parameters. Furthermore, the results illustrate that the tool nomenclature has a great extent on surface roughness followed by table feed and spindle rotational velocity and it has been confirmed through ANOVA and scanning electron microscope.