N.A. Waterman's scientific contributions

Publication (1)

Book
This CD-ROM provides a wealth of information, normally available only from a professional materials consultant. This easy-to-use, portable CD-ROM provides users with a fully searchable materials property and performance database, comparative property charts for selecting candidate materials, case studies, the methodology of product design, backgrou...

Citations

... The machinability index of Inconel 718 is very low in the order of 12, compared to that of low carbon steel (AISI 1018) having a value of 100 ( Fig. 2 (a,b)). [29] Inconel 718 was widely given the title/tag of "difficult-to-cut material" since it possesses some indigenous characteristics which hinder its machinability. [30][31][32][33][34][35][36][37][38][39] Those specific properties are (i) it possesses high mechanical strength and hardness even at elevated temperatures; (ii) has a high tendency for plastic deformation and work hardening at peak temperatures (leading to the deterioration of tool life and surface finish); (iii) low value of thermal conductivity (about 11 W/m℃) causing significant heat generation at the cutting interface during machining operation; (iv) chemically reactive nature of the cutting tools, leads to attrition and diffusion wear at peak cutting temperatures (reaching up to a maximum value of the order of 1200℃ at the rake face) [40] ; (v) notching effect and alteration of the tool at its rake face can result through the mechanisms of adhesion and welding (resulting in material Figure 2. (a) Machinability rating of engineering materials; (b) relative machinability with respect to feed rate. ...