Surface Quality of Ti-6Al-4V Titanium Alloy Parts Machined by Laser Cutting

Abstract

This paper investigates high power CO2 laser cutting of 5mm-thick Ti-6Al-4V titanium alloy sheets, aiming to evaluate the effects of various laser cutting parameters on surface roughness. Using multiple linear regression, a mathematical model based on experimental data was proposed to predict the maximum height of the surface Sz as a function of two laser cutting parameters, namely cutting speed and assist-gas pressure. The adequacy of the proposed model was validated by Analysis Of Variance (ANOVA). Experimental data were compared with the model’s data to verify the capacity of the proposed model. The results indicated that for fixed laser power, cutting speed is the predominant cutting parameter that affects the maximum height of surface roughness.

Experimental Investigations and Pareto Optimization of Fiber Laser Cutting Process of Ti6Al4V

“…An increase in the value of kerf width can be seen in Figure 7 with increasing gas pressure. Higher gas pressure creates greater force on the molten material, which increases the material removal rate [24]. Figure 7 shows the main effect plot for kerf width.…”

“…An optimal combination of process parameters was observed at a cutting speed of 2400 mm/min, gas pressure of 2 bars, and laser power of 1 kW. Attia Boudjemline et al [24] performed experiments using a CO 2 laser source for Ti6Al4V with a thickness of 5 mm, with cutting speed and gas pressure as the machining variables. The cutting speed showed a significant effect for controlling the surface roughness of cut specimens while gas pressure did not show any significant effect.…”

A Realization of Stabilizing the Output Light Power from a Laser Diode: A Practical Approach

“…Authors in [17] studied a semiconductor laser using simulations to determine various parameters in relation to laser structure hence observing maintenance of output parameters at certain structural measurements. Authors in [18] discussed a CO 2 stabilized laser in cutting processes and they carried out a discussion validated by the Analysis Of Variance (ANOVA). However, nothing was discussed for the stabilization of power.…”

Optimization and Performance of Laser Machining on Domex Steel

“…The laser beam machined surface of titanium vanadium alloy was validated through developed mathematical model. Laser power was the most dominant factor on machined surface [10]. Taguchi approach was used to optimize the laser beam machining factor and its performance of quality characteristics were depends on design of experiments [11,12].…”