Open AccessSurface Quality of Ti-6Al-4V Titanium Alloy Parts Machined by Laser Cutting
Author(s) -
Attia Boudjemline,
Mohamed Boujelbene,
E. Bayraktar
Publication year - 2020
Publication title -
engineering, technology and applied science research/engineering, technology and applied science research
Language(s) - English
Resource type - Journals
eISSN - 2241-4487
pISSN - 1792-8036
DOI - 10.48084/etasr.3719
Subject(s) - surface roughness , materials science , titanium alloy , laser power scaling , laser , surface (topology) , linear regression , alloy , titanium , laser cutting , power (physics) , surface finish , regression analysis , machining , power function , metallurgy , mechanical engineering , composite material , optics , mathematics , geometry , statistics , engineering , mathematical analysis , physics , quantum mechanics
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.