A material can be defected by nanosecond laser pulses (multi-shot irradiation).
Then, the laser shock pressure should be higher than the material's plastic yield limit for damage/defect formation?
Aman Mehta
Laser Hardening, often called Laser Case Hardening, primarily seeks to harden metals against friction, abrasive materials, and wear. Laser Peening, on the other hand, adds to the useful life, or fatigue life, of metals, preventing damage from corrosion, cracking, and high-cycle vibration in mechanical parts.Laser shock peening (LSP) is an innovative surface treatment technique for strengthening metallic materials. The treatment improves fatigue performance and is achieved by introducing compressive residual stresses into the material surface layer.
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