OBRABOTKAMETALLOV MATERIAL SCIENCE Vol. 26 No. 1 2024 List of symbols Symbol Description f Feed (mm) Vc Cutting speed (m/min) doc Depth of cut (mm) Ra Surface roughness (μm) MRR Material removal rate (mm3/rev) HSM High speed machining Fc Cutting forces (N) ρ Density (kg/m3) Cp Specifi c Heat (J/kg k) K Thermal Conductivity(W/mk) σ Yield strength (N/m2) α Coeffi cient of thermal expansion (m/mk) Ɵ Temperature (oC) SS 316 Stainless steel SS 316 SAE 8620 Low alloy case hardening steel SAE 8620 EN 8 Engineering steel EN 8 Al 380 Aluminium alloy Al 380 Ø Buckingham’s π theorem constant a1 a2 a3 a4 a5 Power indices b1 b2 b3 b4 b5 Power indices M L T Ɵ Dimensions CBN Cubic boron nitride RSM Response surface methodology CCD Central composite design ANN Artifi cial neural network LM Levenberg-Marquardt
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