The influence of laser assistance on the machinability of the titanium alloy Ti555-3

Abstract

The Ti533-3 alloy is a new titanium alloy which is starting to see increased use in the aeronautical domain to improve the durability of components and to optimize the weight/resistance ratio. This alloy is characterized by greater resistance compared to the more commonly used titanium alloys such as Ti6Al4V. However, a disadvantage of the Ti533-3 alloy is that it is very difficult to machine. In this work, the use of laser-assisted machining has been tested to improve chip formation by a thermal softening phenomenon and to improve the machining productivity of the alloy. A parametric investigation of laser assistance on the machinability of the Ti555-3 titanium alloy shows that: (1) the cutting forces can be greatly decreased if the surface temperature is high; (2) the thermal gradient induced by laser heating modifies the surface integrity in terms of strain hardening and residual stresses in the workpiece; and (3) the chip formation mechanisms are also changed, by increasing the sawteeth frequency when using laser assistance.

Prediction of surface roughness in hard turning under high pressure coolant using Artificial Neural Network

“…This observation is valid for both dry and high pressure coolant assisted turning. A similar relation of speed and roughness parameters was presented in machining difficult-to-cut Ti alloy [32]. The prime cause may be that the high cutting speed tends to remove the built-up-edge and creates stability during machining with low chattering [33].…”

Prediction of Residual Stresses after Laser-assisted Machining of Inconel 718 Using SPH

“…An example is the study by Shi et al [6], where experimental and FEM work was done on the use of LAM under different cutting conditions, and recorded lower cutting forces versus those in CM. Also, Bouchnak et al [7] modeled LAM of 42CrMo4, where cutting forces also dropped at different cutting speeds. Nasr et al [8] performed FE simulations to study the effect of LAM on surface RS in AISI 4340 at different feed rates.…”

“…However, very little attention has been paid to the effect of LAM on RS in the available literature; even less work is available on modeling the LAM process itself. By reviewing the available literature, one can find that studies are focused on tool wear, surface roughness, surface hardness, cutting forces and chip formation [1][2][3][4][5][6][7]. A study by Navas et al [2] focused on age-hardened and solution-annealed Inconel 718, where the machinability of both alloys was improved, especially the former.…”

Cutting performance and coated tool wear mechanisms in laser-assisted milling K24 nickel-based superalloy

“…Laser-assisted machining (LAM) was first tried in late 1970s to increase productivity in machining difficult-to-machine materials, such as nickel-based superalloys, titanium alloys, and hardened steels [1][2][3][4][5]. LAM is based on the idea that the yield strength of a material would decrease with an elevated temperature which decrease the required cutting force and in this way increase the ease of material removal.…”