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8 Keyhole and Weld Pool Dynamics in Laser Welding with Filler Wires
(a) Section A
(b) Section B
(c) Section C
Fig. 8.28 Concentration distribution of the wire composition in different longitudinal sections after
the quasi-steady state is reached
To study the dynamic evolution process of the wire composition concentration
over time in the upper part of the moving weld pool, two points in the longitudinal
section of the true center of the moving weld pool are taken as study objects—Point
X (the left dark point in Fig. 8.28a) and Point Y (the right blue point in Fig. 8.28a).
As shown in the figure, coordinates of Point X and Point Y only have difference
along welding direction; Point X is closer to the keyhole. Figure 8.29 is the evolution
(a) Point X closer to the keyhole
Additive concentration/(X 100%)
(b) Point Y further from the keyhole
Time ms
Time ms
Additive concentration/(X 100%)
Coordinate of X
(81,56,51)
Coordinate of Y
(91,56,51)
Fig. 8.29 Evolution process of the wire composition concentration at different points in the upper
part of the moving weld pool