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Laser Peening

Laser Shock Peening (LSP)

posted Feb 19, 2011, 3:06 PM by Hongtao Ding   [ updated Nov 19, 2011, 8:53 PM ]

Laser shock peening (LSP) is an innovative surface treatment technique applied to improve the mechanical properties and surface microstructures of metallic components.  This work is concerned with prediction of the microstructural evolution of metallic components subjected to single or multiple LSP impacts.  A numerical framework is developed to model the evolution of dislocation density and dislocation cell size using a dislocation density-based material model. 

Figure 1. Schematic illustration showing micro-structural evolution process of LY2 aluminum alloy 

induced by multiple LSP impacts

Figure 2. LSP experimental setups

Figure 3. Flow chart for model calculations

Figure 4. Total dislocation density and dislocation cell size predictions for [001] copper

Figure 5. Microhardness for multiple LSP impacts of LY2 aluminum alloy

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