240
8 Keyhole and Weld Pool Dynamics in Laser Welding with Filler Wires
(a) Point X closer to the keyhole
(b) Point Y further from the keyhole
"Wire"
Concentration/(x 100%)
Time ms
"Wire" element
Ti element
Concentration/(x 100%)
Time ms
"Wire" element
Ti element
Fig. 8.33 Variations in the intensity of dilution of Ti composition at different positions in the upper
part of the moving weld pool
moving weld pool; otherwise, the parent metal will be diluted. ➁ The intensity of
dilution of chemical compositions is generally different at different positions, and
the time for them to reach quasi-steady state is also inconsistent. ➂ The larger the
content difference of chemical compositions in the wire and parent metal, the greater
the intensity of dilution at the initial stage of dynamic dilution.