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Comparative study of
symmetric and asymmetric deformation of Al single crystal
under microscale laser shock peening
Siniša Vukelić, Youneng Wang, Jeffrey W. Kysar and Y. Lawrence Yao |
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Vol. 4 (2009), No. 1, 89–105
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Abstract |
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The process of laser shock peening induces compressive residual stresses in a material to improve material fatigue life. For micron sized laser beams, the size of the laser-target interaction zone is of the same order of magnitude as the target material grains and, thus, the target material must be considered anisotropic and inhomogeneous. Single crystals are chosen to study the effects of the anisotropic mechanical properties. It is of further interest to investigate the response of symmetric and asymmetric slip systems with respect to the shocked surface. In the present study, analytic, numerical, and experimental aspects of laser shock peening on two different crystal surfaces, (110) and , of aluminum single crystals are studied. Anisotropic slip line theory is employed for the construction of slip line fields for both orientations and compared with numerical results. Lattice rotations of the cross section are measured using Electron Backscatter Diffraction (EBSD). |
Keywords
laser shock peening, single crystal, micromechanics,
anisotropic slip line theory
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Milestones
Received: 17 September 2008
Revised: 10 November 2008
Accepted: 13 November 2008
Published: 8 April 2009
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Authors |
| Siniša Vukelić | |
| Columbia University Mechanical Engineering Department 500 W 120th Street, S. W. Mudd Building Room 220, MC 4703 New York, NY 10027 United States |
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| Youneng Wang | |
| Columbia University Mechanical Engineering Department 500 W 120th Street, S. W. Mudd Building Room 220, MC 4703 New York, NY 10027 United States |
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| Jeffrey W. Kysar | |
| Columbia University Mechanical Engineering Department 500 W 120th Street, S. W. Mudd Building Room 220, MC 4703 New York, NY 10027 United States |
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| Y. Lawrence Yao | |
| Columbia University Mechanical Engineering Department 500 W 120th Street, S. W. Mudd Building Room 220, MC 4703 New York, NY 10027 United States |
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