Summary

Laser spot welding is beneficial when welding small and/or electrical components where a snail heat-affected zone is required. The modeling of heat transfer analysis carried out until now omits thermal efficiency analysis of the process involved. This may become important when optimization and cost effectiveness of the welding process is concerned, Consequently, the present study was conducted tie develop expressions relevant to the welding efficiencies based on the first and second laws of thermodynamics. The study is extended to include an experimental investigation into the welding process to relate the first- and second-law efficiencies with mechanical properties of the resulting welds