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A comparative study of single mode fibre laser and Nd:YAG laser welding of Ti-6Al-4V

Research output: Contribution in Book/Report/ProceedingsPaper


Publication date2008
Host publicationProceedings of the 3rd Pacific International Conference on Applications of Lasers and Optics (PICALO)
PublisherLaser Institute of America
Number of pages6
Original languageEnglish


This study considers welding of Ti-6Al-4V, which is widely used in the chemical, automotive, aerospace and medical industries due to its high strength-to-weight ratio and corrosion resistance. Bead-on-plate melt on 2.15 mm thick plates with a 1 kW single mode fibre laser and a continuous wave 4 kW Nd:YAG laser are investigated and compared. The fibre laser was found to produce narrower welds with finer microstructure using less than 30% the laser power required by the Nd:YAG laser. However, levels of porosity were generally higher meaning the Nd:YAG laser welds were classified as higher quality according to American Welding Standard D17.1:2007. In both cases there was a trend for lower porosity at a higher laser power when the welding speed was higher. The difference in porosity levels may have been partly or wholly due to the different inert gas shielding systems used.