THE EFFECTS OF LASER MICRO-ENGRAVING VARIABLES ON THE SURFACE CHARACTERISTICS OF THE Ti-6Al-7Nb ALLOY
Abstract
This investigation aims to analyze the impact of scanning direction, scanning speed, and power level (%) on the surface roughness of Ti-6Al-7Nb alloy specimens subjected to laser micro-engraving. The laser micro-engraving process was carried out by scanning the predetermined geometric configuration six times. Factorial analysis was implemented to determine the impact of system parameters on the surface roughness. Throughout the micro-engraving operations, line spacing, frequency, and pulse width parameters were maintained at a consistent value of 0.03 mm, 100 kHz, and 300 ns, respectively. The optimal conditions for achieving the lowest surface roughness were observed at a scanning speed of 700 mm/s, a power level of 60%, and a scanning direction of 90°. Moreover, in accordance with the experimental parameters employed in this investigation, it was observed that increasing the scanning speed while maintaining a constant power level (%) reduced surface roughness. There was a direct correlation between the increase in power level (%) and a corresponding increase in surface roughness.
Keywords
Laser , micro-engraving , Ti-6Al-7Nb alloy , surface roughness
References
- Bakhtiyari AN, Wang Z, Wang L, Zheng H. A review on applications of artificial intelligence in modeling and optimization of laser beam machining, Optics & Laser Technology 2021; 135: 106721.
- Rao RV, Kalyankar VD. Optimization of modern machining processes using advanced optimization techniques: a review, The International Journal of Advanced Manufacturing Technology 2014; 73: 1159-1188.
- Brousseau EB, Dimov SS, Pham DT. Some recent advances in multi-material micro- and nano-manufacturing, The International Journal of Advanced Manufacturing Technology 2010; 47: 161-180.
- Saklakoglu IE, Kasman S. Investigation of micro-milling process parameters for surface roughness and milling depth, The International Journal of Advanced Manufacturing Technology 2011; 54: 567-578.
- Dubey AK, Yadava V. Laser beam machining—A review, International Journal of Machine Tools and Manufacture 2008; 48: 609-628.
- Parandoush P, Hossain A. A review of modeling and simulation of laser beam machining, International Journal of Machine Tools and Manufacture 2014; 85: 135-145.
- Romoli L. Flattening of surface roughness in ultrashort pulsed laser micro-milling, Precision Engineering 2018; 51: 331-337.
- Ramesh S, Karunamoorthy L, Palanikumar K. Measurement and analysis of surface roughness in turning of aerospace titanium alloy (gr5), Measurement 2012; 45: 1266-1276.
- Peters M, Kumpfert J, Ward CH, Leyens C. Titanium Alloys for Aerospace Applications, Advanced Engineering Materials 2003; 5: 419-427.
- Boyer RR. An overview on the use of titanium in the aerospace industry, Materials Science and Engineering: A 1996; 213: 103-114.