Question

In laser beam welding, ——––––––––– are associated with the evolution of vapor from the surface of the material to produce a needle-like, vapor-filled cavity or keyhole in the work piece through which the beam can penetrate.

• A. Magnetic forces
• B. Tensile forces
• C. Compressive forces
• D. Recoil forces

Hint:

Recoil forces play a significant role in laser beam welding, as they help in the formation of keyholes, enabling deeper penetration of the beam into the material.

Answer 1

The Correct Option is D

In laser beam welding, recoil forces arise from the rapid evaporation of material, creating a keyhole in the workpiece. These forces cause a vapor pressure that pushes material away from the keyhole, helping the laser beam penetrate deeper into the material.