Laser shock peening on fatigue behavior of 2024-T3 Al alloy with fastener holes and stopholes

• Published in: Materials science & engineering. A, Structural materials : properties, microstructure and processing Vol. 298; no. 1; pp. 296 - 299
• Main Authors: Yang, J.-M., Her, Y.C., Han, Nanlin, Clauer, Alan
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 31.01.2001; Elsevier
• Subjects: Applied sciences; Exact sciences and technology; Fatigue behavior; Fractures; Laser shock peening; Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology; Metals. Metallurgy; Residual stress; Laser shock peening; Residual stress; Fatigue behavior; Crack array; Fatigue life; Hole; Aluminium base alloys; Propagation velocity; Notch; Fatigue; Shot peening; Experimental study; Shock wave; Fatigue crack; Edge crack; Crack propagation; Laser materials processing; Crack length; Crack initiation
• ISSN: 0921-5093; 1873-4936
• DOI: 10.1016/S0921-5093(00)01277-6

The effect of laser shock peening on the fatigue behavior of 2024-T3 aluminum alloy with a fastener hole, multiple crack stopholes and single-edge notch was investigated. Laser shock peening (LSP) was performed under a ‘confined ablation mode’ using a Nd:glass laser at a laser power density of 5 GW cm −2. The fatigue crack initiation life and fatigue crack growth rates of the Al alloy, with different preexisting notch configurations, were characterized and compared with those of the unpeened material. The results clearly show that LSP is an effective surface treatment technique for improving the fatigue performance of Al alloys having various preexisting notch configurations.