Dry machining of Inconel 718, workpiece surface integrity

By A. Devillez, G. Coz, S. Dominiak, D. Dudzinski. 2011

416 citations recorded by the source corpus.

Abstract In the machining of Inconel 718, nickel based heat resistant superalloy and classified difficult-to-cut material, the consumption of cooling lubricant is very important. To reduce the costs of production and to make the processes environmentally safe, the goal is to move toward dry cutting by eliminating cutting fluids. This goal can be achieved by using coated carbide tool and by increasing cutting speed. The present paper firstly reviews the main works on surface integrity and especially residual stresses when machining Inconel 718 superalloy. It focuses then on the effect of dry machining on surface integrity. Wet and dry turning tests were performed at various cutting speeds, with semi-finishing conditions (0.5 mm depth of cut and 0.1 mm/rev feed rate) and using a coated carbide tool. For each cutting test, cutting force was measured, machined surface was observed, and residual stress profiles were determined. An optimal cutting speed of 60 m/min was determined, and additional measurements and observations were performed. Microhardness increment and the microstructure alteration beneath the machined surface were analysed. It is demonstrated that dry machining with a coated carbide tool leads to potentially acceptable surface quality with residual stresses and microhardness values in the machining affected zone of the same order than those obtained in wet conditions when using the optimised cutting speed value; in addition, no severe microstructure alteration was depicted.

Subfields: Electrical and Electronic Engineering, Mechanical Engineering

View Paper: https://www.semanticscholar.org/paper/fa6642c982b386f45b02d7d2e870d0e4dace10c6

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Electrical and Electronic Engineering

In Mechanical Engineering

Citations in the corpus

Optimization of surface roughness and cutting temperature in high-pressure coolant-assisted hard turning using Taguchi method (2016, background): “Machining at optimum parameter setting reveals the favorable performances [42].”
The effect of cutting fluids applied in metal cutting process (2016, background): “The effect of dry machining on surface integrity of Inconel 718 at semi-finishing conditions was investigated, compared with wet cutting.(61) The results demonstrated that in the machining affected zone, dry machining led to acceptable surface quality with residual stresses, surface roughness (as sh”
A Review on Minimum Quantity Lubrication for Machining Processes (2015, background): “[31] Inconel 718 Coated carbide Vc: 40, 60, 80; fn: 0.”