494851.fig.001a
(a) 1.1 kW
494851.fig.001b
(b) 1.3 kW
494851.fig.001c
(c) 1.5 kW
494851.fig.001d
(d) 1.9 kW
Figure 1: Influence of laser output power on cross-section morphologies of welded seam. ( 0 mm;  m/min; 15 L/min).