Fig. 6: Keyhole porosity mitigation due to laser oscillation.
From: High frequency beam oscillation keyhole dynamics in laser melting revealed by in-situ x-ray imaging
DXR images capture the keyhole depth evolution. The top series a shows the keyhole evolution in the case of linear scan and the bottom series b shows the corresponding case with a circular oscillation diameter of 0.12 mm. Both scans used 400 W laser power and 0.2 m s−1 scan speed. Note the timestamp shows the elapsed time since the laser was triggered. (See Supplementary Movies 05, 06.).
