Which consequence results when a laser welding process leads to excessive power?

💡 Explanation

Metal vaporization and keyhole instability occur because excessive laser power causes rapid heating. The **vapor recoil pressure** increases, creating an unstable keyhole that sputters molten metal. Therefore, spatter increases during welding, rather than reducing haz size or incomplete melting; these require more controlled settings.

• Which risk increases when a turbine stage operates under off-design expansion ratios?
• Which issue worsens by mismatched conduction band alignment?
• Which mechanism leads to thermoset polymers retaining their shape when heated after initial curing?
• Which outcome occurs when control rods fail within a CANDU reactor?
• Which outcome occurs when a free radical interacts with polyunsaturated lipid orbitals?
• Which consequence results when a supersonic airflow encounters backward-facing step?