Laser shock processing and its effects on microstructure and properties of metal alloys: a review

• Published in: International journal of fatigue Vol. 24; no. 10; pp. 1021 - 1036
• Main Authors: Montross, Charles S., Wei, Tao, Ye, Lin, Clark, Graham, Mai, Yiu-Wing
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01.10.2002; Elsevier Science
• Subjects: Applied sciences; Exact sciences and technology; Fatigue; Laser peening; Laser shock processing; Metals. Metallurgy; Microstructure; Morphology; Other surface treatments; Production techniques; Residual stress; Surface treatment; Laser shock processing; Fatigue; Microstructure; Morphology; Residual stress; Laser peening; Plastic fatigue; Stress analysis; Fretting fatigue; Laser assisted processing; Shot peening; Peening; Review; Stress corrosion cracking; Shock wave; Surface treatment; Shock heating; Strength
• ISSN: 0142-1123; 1879-3452
• DOI: 10.1016/S0142-1123(02)00022-1

The current status of research and development on laser shock processing of metals, also known as laser peening, using Q-switched high power lasers is reviewed. The influence of processing parameters on the laser-induced shock waves in metal components are discussed and analyzed. Special attention is paid to the residual stresses and improved fatigue performance from laser peening, which are compared with conventional shot peening results. Modification of microstructure, surface morphology, hardness, and strength by laser peening is also discussed. Finally, applications of laser peening are addressed. Results to date indicate that laser peening has great potential as a means of improving the mechanical performance of components.