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TECHNICAL PAPERS

Characterization of Plastic Deformation Induced by Microscale Laser Shock Peening

[+] Author and Article Information
Hongqiang Chen, Jeffrey W. Kysar, Y. Lawrence Yao

Department of Mechanical Engineering, Columbia University, New York, NY 10027

J. Appl. Mech 71(5), 713-723 (Nov 09, 2004) (11 pages) doi:10.1115/1.1782914 History: Received September 04, 2003; Revised April 29, 2004; Online November 09, 2004
Copyright © 2004 by ASME
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References

Figures

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Laser shock peening setup
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Sample geometry and laser shock peening condition; (a) Al(11̄0) sample and Cu(11̄0) sample, (b) Al (001) sample
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Measurement of shocked line geometry using AFM for Al(11̄0) sample (scan area=100×100 μm); (a) three-dimensional geometry, (b) cross section geometry at different positions (line spacing=20 μm)
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EBSD automatic indexing map on top surface and on newly exposed cross section
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Inverse pole figure of sample surface under shock peening (Z-direction is shock direction, Y-direction is the sample surface normal)
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Lattice rotation contour map on sample surface (line 1–4: four cross section with spacing=20 μm); (a) and (b): Al(11̄0) sample; (c) and (d): Cu(11̄0) sample; (e) and (f ): Al (001) sample
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Lattice rotation contour at the cross section (a) Al(11̄0) sample; (b) Cu(11̄0) sample
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Scan scheme of X-ray microdiffraction
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(a) In-plane lattice rotation on shock peened surface of Al(11̄0) sample. (b) Out-of-plane lattice rotation on shock peened surface of Al(11̄0) sample. (c) In-plane lattice rotation on shock peened surface of Cu(11̄0) sample. (d) Out-of-plane lattice rotation on shock peened surface of Cu(11̄0) sample.
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Plastic deformation in single crystal plasticity
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Lattice rotation field on cross section of after laser shock peening; (a) Al(11̄0), (b) Cu(11̄0), (c) Al (001)
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Spatially distribution of latticed rotation on sample surface from simulation
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Deformation profile in depth direction from simulation and AFM; (a) FEM result, (b) AFM result
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Three plane-strain slip systems and yield surface in (110) plane; (a) Al(11̄0) and Cu(11̄0) sample, (b) Al (001) sample, (c) yield surface in (110) plane
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Shear strain on active slips under laser shock peening from simulation; (a) shear strain of active slip systems for Al(11̄0) sample, (b) shear strain of active slip systems for Cu(11̄0) sample, (c) shear strain of active slip systems for Al (001) sample

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