The solid line represents the solidus and the dashed line represents the keyhole marked by. Comparison of calculated and experimental weld geometry for tantalum welds made with 1900 W input laser power at welding speeds (a) 0.85 mm s −1, (b) 1.7 mm s −1, (c) 2.54 mm s −1, (d) 3.81 mm s −1, (e) 6.4 mm s −1 and (f) 12.7 mm s −1.
