3.6 Summary
103
Laser energy
Plasma absorption
Energy entering the pore
Energy incident outside the pore
Energy reaching the workpiece
Plasma shielding
Energy involved in multiple
reflections
The first Fresnel absorption
Energy reaching the pore wall
Energy leaving the pore
Unabsorbed energy
Fresnel absorption and plasma
absorption in multiple
reflections
Fig. 3.12 Schematic diagram of laser welding energy absorption mechanism