Laser shock peening
Laser shock peening uses high-energy laser pulses and an opaque overlay to create deep plastic deformation and high compressive residual stresses, increasing material strength.
Physical-Chemical Mechanism of Action
A laser shock peening system uses high-energy laser pulses to generate a shock wave in a material. This shock wave causes deep plastic deformation and increases compressive residual stresses in the material.
Metallurgical Relevance & Risks in Welding
The high compressive residual stress can improve the strength and toughness of the material. However, incorrect use or insufficient overlay can cause thermal distortion or even melting of the material, which can impair weld quality.
Shop Practice & Action Guidelines
To use laser shock peening successfully, it's important to use an opaque overlay and focus the laser on the material. The laser energy must be set precisely to achieve the desired deformation and strength. Insufficient overlay or too high energy mode can have negative effects.