The study looked at how using high-intensity laser beams on stainless steel can improve its strength and surface properties. By using different laser power levels, the researchers found that the highest intensity led to the greatest increase in compressive stress and hardness on the surface. They also observed changes in the steel's microstructure, including more tiny grains and dislocations. Overall, laser peening without coating can make stainless steel stronger and more resistant to wear and tear.