Nickel-based high temperature alloys have excellent physical properties, which make them ideal for use in the manufacture of aerospace components. However, they exhibit poor machinability. Though conventional machining in industries is currently being carried out using carbide tools, there is little scope for improving the material removal rate. Machining, being a major operation, needs to be improved in order to reduce the throughput time. High Speed Machining (HSM) is a promising technique for increasing productivity in this regard. This paper mostly reviews research and development work in the machining of nickel-based high temperature alloys carried out over the last 15 years with the objective of assessing the present scenario. Emphasis is laid on Inconel 718, which is most commonly used. Both turning and milling operations using conventional and High Speed (HS) machining are reviewed herein. HSM is discussed at length in comparison with conventional machining, as it is possible to drastical...

Machinability of nickel-based high temperature alloys

In this paper , T aguchi method is applied to find optimum process parameters for end milling while hard machining of hardened steel. A L 18 array , signal-to-noise ratio and analysis of variance (ANOV A) are applied to study performance characteristics of machining parameters (cutting speed, feed, depth of cut and width of cut) with consideration of surface finish and tool life. Chipping and adhesion are observed to be main causes of wear . Results obtained by T aguchi method match closely with ANOV A and cutting speed is most influencing parameter . Multiple regression equations are formulated for estimating predicted values of surface roughness and tool wear

http://nopr.niscair.res.in/bitstream/123456789/5301/1/JSIR%2068%288%29%20686-695.pdf

Taguchi method and anova: an approach for process parameters optimization of hard machining while machining hardened steel

Design optimization of cutting parameters when turning hardened AISI 4140 steel (63 HRC) with Al2O3 + TiCN mixed ceramic tool

http://coewww.rutgers.edu/marl/pdf/jmp-2000.pdf

R.C Dewes

Papers

A review of ultra high speed milling of hardened steels