Appearance

Laser Shocking Peening (LSP) technology, also known as laser peening technology. When a laser with high power density (GW/cm level) and short pulse (10-30 ns level) acts on the energy absorption coating coated on the metal surface through a transparent confinement layer, the coating absorbs the laser energy and vaporizes rapidly, and at almost the same time, a large number of dense high-temperature (> 10K) and high-pressure (> 1GPa) plasmas are formed.

Aerial View

This plasma continues to absorb laser energy, rapidly heats up and expands, and then explodes to form a high-intensity shock wave acting on the metal surface. When the peak pressure of the shock wave exceeds the dynamic yield strength of the material, the material undergoes plastic deformation and generates tensile stress parallel to the material surface in the surface layer. After the laser action ends, due to the reaction of the material around the impact area, its mechanical effect is that a relatively high residual compressive stress is obtained on the material surface.