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Study on Simulation of Residual Stress Distribution in Microscale Laser Shock Peening Based on Crystal Orientation

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Microscale laser shock peening can generate beneficial compressive stress distribution in the targets to improve fatigue life of the material. Mechanical performance of metal material is greatly different with the size of parameter at micron or nanometer order. The beam spot size used in microscale laser shock peening is micron the same order as grain size in many materials, the deformation is induced in only a few grains so that it is necessary to treat material as being anisotropic and heterogeneous. The influence of crystal orientation is investigated using single crystal plasticity in finite element analysis. Laser processing parameters on the effect of residual stress distribution were discussed with the simulations of microscale laser shock peening based on (001) orientation, and crystal plasticity theory was adopted to explain the mechanism of influence on residual stress distribution, which will provide a valuable guidance for further study of controlled microscale laser shock peening.
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Keywords: CRYSTAL ORIENTATION; MICROSCALE LASER SHOCK PEENING; PROCESSING PARAMETERS; RESIDUAL STRESS

Document Type: Research Article

Publication date: September 1, 2012

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  • Journal of Computational and Theoretical Nanoscience is an international peer-reviewed journal with a wide-ranging coverage, consolidates research activities in all aspects of computational and theoretical nanoscience into a single reference source. This journal offers scientists and engineers peer-reviewed research papers in all aspects of computational and theoretical nanoscience and nanotechnology in chemistry, physics, materials science, engineering and biology to publish original full papers and timely state-of-the-art reviews and short communications encompassing the fundamental and applied research.
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