The Effects of Laser Shock Peening on Microstructure and Properties of Metals and Alloys: A Review

Abstract

This study reviews the current status of the understanding and development of laser shock peening(LSP) on various metals. The influence of processing parameters on residual stresses, microstructure and properties are discussed. Special emphasis is placed on analyzing their underlying interrelationship between the LSP induced modifications. Finally, recommendations for further study are listed. Results indicate that the combination of uniquely flexible process and excellent performance makes the laser shock peening an attractive candidate for surface optimization applications.

Resource efficient low power laser cleaning of compact discs for material reuse by polycarbonate recovery

“…As a matter of fact, the process conditions adopted here are close to the ones usually required in laser peening, as reported in Hu et al [45]. Although nanosecond pulse regimes are able to induce thermal stress [48,49], in all the adopted process conditions, metal vaporisation was always observed, as visible in Fig.…”

“…This process is very similar to the laser peening process [45]. The shock wave is boosted by the presence of a transparent coating on the metal layer (represented by the PC layer in the present case).…”

Finite-element simulation of residual stresses induced by laser shock peening in TC4 samples structurally similar to a turbine blade

“…After the dynamic loading decays and static equilibrium of the detail is attained, the plastic strain leads to the occurrence of beneficial compressive residual stress in the subsurface layer. The compressive residual stress generated by LSP can reach high amplitude of about ̴ 1 GPa and extend into material up to depth of several millimeters [4]. Besides, laser shots only slightly disturb surface roughness [5], but noticeably improve surface hardness [6,7].…”