Abstract
Nimonic C263 is a super alloy and it is difficult to cut. As this alloy possess high proportion of chromium, cobalt, and molybdenum, which fortify the material by solution hardening, which inhibits the dislocation movement, resulting in higher plastic deformation. In this research, an attempt has been made to model, analysis and investigate the machining characteristics such as thrust force, temperature at drill cutting edge, flank wear and surface finish during drilling of this alloy using silver nano fluid mixed Minimum Quantity Lubrication (MQL) environment. Residual stress at various combinations of process parameters was also observed and discussed. RSM based empirical models of the process parameters and optimization of multi response was developed. Thrust force, Temperature at drill cutting edge, surface roughness and tool wear affected by feed rate (percentage of contribution-60%), spindle speed (percentage of contribution-88.63%), spindle speed (percentage of contribution-71.42%) and feed rate (percentage of contribution-67.76%) respectively followed by other parameters.
Highlights
Nimonic C-263 alloy finds wide applications in aero engines, heat exchangers due to its special properties such as low thermal conductivity, high creep, high work hardening rate, good thermal fatigue, oxidation, and corrosion resistance
The present work concentrates on the investigations of the thrust force, temperature at drill cutting edge, surface roughness and flank wear, while drilling this alloy under Nano fluid mixed Minimum Quantity Lubrication (MQL) condition
The important findings of the study are summarized as follows: – It was found that optimum parameter design for multi responses was spindle speed-1297, feed rate0.05, coolant pressure-750 Â 103 (Pa), Nano particle concentration-1.5 (g). – Speed of the Spindle was identified as a dominant factor on thrust force followed by feed rate, coolant pressure and nano particle concentration
Summary
Nimonic C-263 alloy finds wide applications in aero engines, heat exchangers due to its special properties such as low thermal conductivity, high creep, high work hardening rate, good thermal fatigue, oxidation, and corrosion resistance. It is tough to cut and need to find out suitable machining condition to produce quality surface and other manufacturing attributes It has Gama precipitates and metallic carbides, and its cobalt content strengthens during solidification [1,2]. As Nimonic C263 is used in the aircraft engines which are continuously subjected to high temperature, its integrity has to be maintained and utmost care is to be taken during machining. As this alloy is expensive and arduous to machine, these components have to be made with care to maintain the required quality and need to resist the
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