Influence of High-Pressure Coolant Assistance on the Machinability of the Titanium AlloyTi555–3

Abstract

is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible. ABSTRACTThe originality of this paper is the quantification of productivity gains and the improvement in surface integrity seen for a recent titanium alloy that is seeing increasing use in the aeronautical industry. The Ti555-3 titanium alloy, which is starting to find greater application in the aeronautical field, exhibits certain difficulties in terms of machining. High Pressure Coolant (HPC) assisted turning consists of projecting a high pressure coolant jet between the chip and the tool. Comparisons are made between assisted turning using variable jet pressure and conventional turning (dry and classical lubrication). It is shown that it is possible to improve productivity by using HPC assisted machining. The results highlight good chip fragmentation and a great improvement of tool life with HPC assistance. Surface integrity is also shown to be improved, through surface roughness parameters which decrease, and surface residual stresses which become more compressive. These effects have been attributed to the thermo-mechanical action of eray 49000 Angers, France.the coolant jet resulting in lower cutting forces, lower coefficient of friction and lower temperature in the cutting zone.

Effects of High-Pressure Coolant Jets on the Machinability of Ti-6Al-4V Alloy with External Rotary Liquid Applicator

“…The graphical representation demonstrates that the average surface roughness gradually reduces as the cutting velocity increases. This can be related to the work material's local thermal softening (a less thermally conductive Ti-6Al-4V alloy confines heat for an extended period) at a specific temperature, as shown in another research finding [34]. Additionally, less BUE generation with a smaller contact area and less chattering at a faster cutting velocity [11] decrease surface roughness.…”

Coating-thickness-dependent physical properties and cutting temperature for cutting Inconel 718 with TiAlN coated tools

“…6 B illustrates the average tool-chip friction coefficient µ determined by Eq. (4) when machining Inconel 718 with Ti 0.55 Al 0.45 N coated carbide tools with various coating thicknesses [18] . Compared to the Ti 0.55 Al 0.45 N coated carbide tools with coating thicknesses of 1.6 µm and 2.5 µm, a low average friction coefficient could be obtained by Ti 0.55 Al 0.45 N coated carbide tools with coating thicknesses of 2 µm and 3 µm.…”

Thermo-mechanical aspects of cutting forces and tool wear in the laser-assisted turning of Ti-6Al-4V titanium alloy using AlTiN coated cutting tools

“…Also in the case of titanium alloys, research in the field of LAM machining can be found [40]. Braham-Bouchnak et al [8] studied the effect of laser assistance on the machinability of the Ti533-3 alloy. They showed a reduction in cutting forces with increasing temperature, which is significantly influenced by cutting parameters and laser power.…”