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 as being anisotropic and inhomogeneous. Single crystals are chosen to study the effects of the anisotropic mechanical properties. It is also of interest to investigate the response of symmetric and asymmetric slip systems with respect to the shocked surface. In the present study, numerical and experimental aspects of laser shock peening on two different crystal surfaces (110) and of aluminum single crystals are studied. Lattice rotations on the top surface and cross section are measured using electron backscatter diffraction, while residual stress is characterized using X-ray microdiffraction. A numerical model has been developed that takes into account anisotropy as well as inertial terms to predict the size and nature of the deformation and residual stresses. Obtained results were compared with the experimental finding for validation purpose.
Issue Section:
Research Papers
Keywords:
aluminium,
fatigue,
internal stresses,
laser materials processing,
slip,
X-ray diffraction
1.
Clauer
, A. H.
, and Holbrook
, J. H.
, 1981, “Effects of Laser Induced Shock Waves on Metals
,” Shock Waves and High Strain Phenomena in Metals-Concepts and Applications
, New York
, pp. 675
–702
.2.
Clauer
, A. H.
, and Lahrman
, D. F.
, 2001, “Laser Shock Processing as a Surface Enhancement Process
,” Key Eng. Mater.
, 197
, pp. 121
–142
. 1013-98263.
Fabbro
, R.
, Fournier
, J.
, Ballard
, P.
, Devaux
, D.
, and Virmont
, J.
, 1990, “Physical Study of Laser-Produced Plasma in Confined Geometry
,” J. Appl. Phys.
0021-8979, 68
(2
), pp. 775
–784
.4.
Hammersley
, G.
, Hackel
, L. A.
, and Harris
, F.
, 2000, “Surface Prestressing to Improve Fatigue Strength of Components by Laser Shot Peening
,” Opt. Lasers Eng.
0143-8166, 34
(4–6
), pp. 327
–337
.5.
Zhang
, W.
, and Yao
, Y. L.
, 2002, “Microscale Laser Shock Processing of Metallic Components
,” ASME J. Sol. Energy Eng.
0199-6231, 124
, pp. 369
–378
.6.
Chen
, H. Q.
, Kysar
, J. W.
, and Yao
, Y. L.
, 2004, “Characterization of Plastic Deformation Induced by Microscale Laser Shock Peening
,” ASME J. Appl. Mech.
0021-8936, 71
(5
), pp. 713
–723
.7.
Chen
, H. Q.
, Yao
, Y. L.
, and Kysar
, J. W.
, 2004, “Spatially Resolved Characterization of Residual Stress Induced by Micro Scale Laser Shock Peening
,” ASME J. Manuf. Sci. Eng.
1087-1357, 126
(2
), pp. 226
–236
.8.
Ungar
, T.
, Mughrabi
, H.
, Ronnpagel
, D.
, and Wilkens
, M.
, 1984, “X-Ray Line-Broadening Study of the Dislocation Cell Structure in Deformed [001]-Orientated Copper Single-Crystals
,” Acta Metall.
0001-6160, 32
(3
), pp. 333
–342
.9.
Hill
, R.
, 1998, The Mathematical Theory of Plasticity
(Oxford Engineering Science Series
), Clarendon
, Oxford
/Oxford University Press
, New York
.10.
Hencky
, H.
, 1923, “Concerning the on Static Dependent Equilibrium of Plastic Material
,” Z. Angew. Math. Mech.
0044-2267, 3
, pp. 241
–251
.11.
Prandtl
, L.
, 1923, “Anwendungsbeispiele Zu Einem Henckyschen Salt Über Das Plastische Gleichgewicht
,” Z. Angew. Math. Mech.
, 3
, pp. 401
–406
. 0044-226712.
Rice
, J. R.
, 1973, “Plane Strain Slip Line Theory for Anisotropic Rigid-Plastic Materials
,” J. Mech. Phys. Solids
0022-5096, 21
(2
), pp. 63
–74
.13.
Booker
, J. R.
, and Davis
, E. H.
, 1972, “General Treatment of Plastic Anisotropy Under Conditions of Plane Strain
,” J. Mech. Phys. Solids
0022-5096, 20
(4
), pp. 239
–250
.14.
Rice
, J. R.
, 1987, “Tensile Crack Tip Fields in Elastic Ideally Plastic Crystals
,” Mech. Mater.
0167-6636, 6
(4
), pp. 317
–335
.15.
Drugan
, W. J.
, 2001, “Asymptotic Solutions for Tensile Crack Tip Fields Without Kink-Type Shear Bands in Elastic-Ideally Plastic Single Crystals
,” J. Mech. Phys. Solids
0022-5096, 49
(9
), pp. 2155
–2176
.16.
Kysar
, J. W.
, and Briant
, C. L.
, 2002, “Crack Tip Deformation Fields in Ductile Single Crystals
,” Acta Mater.
1359-6454, 50
(9
), pp. 2367
–2380
.17.
Kysar
, J. W.
, Gan
, Y. X.
, and Mendez-Arzuza
, G.
, 2005, “Cylindrical Void in a Rigid-Ideally Plastic Single Crystal. Part I: Anisotropic Slip Line Theory Solution for Face-Centered Cubic Crystals
,” Int. J. Plast.
, 21
(8
), pp. 1481
–1520
. 0749-641918.
Wang
, Y.
, Kysar
, J. W.
, and Yao
, Y. L.
, 2008, “Analytical Solution of Anisotropic Plastic Deformation Induced by Micro-Scale Laser Shock Peening
,” Mech. Mater.
, 40
(3
), pp. 100
–114
. 0167-663619.
Fox
, J. A.
, 1974, “Effect of Water and Paint Coatings on Laser-Irradiated Targets
,” Appl. Phys. Lett.
0003-6951, 24
(10
), pp. 461
–464
.20.
Crone
, W. C.
, Shield
, T. W.
, Creuziger
, A.
, and Henneman
, B.
, 2004, “Orientation Dependence of the Plastic Slip Near Notches in Ductile FCC Single Crystals
,” J. Mech. Phys. Solids
0022-5096, 52
(1
), pp. 85
–112
.21.
SPEC X-Ray Diffraction Software, Certified Scientific Software, Cambridge, MA.
22.
Fan
, Y.
, Wang
, Y.
, Vukelic
, S.
, and Yao
, Y. L.
, 2005, “Wave-Solid Interactions in Laser-Shock-Induced Deformation Processes
,” J. Appl. Phys.
0021-8979, 98
(10
), pp. 104904
–104904-11
.23.
Peyre
, P.
, Sollier
, A.
, Chaieb
, I.
, Berthe
, L.
, Bartnicki
, E.
, Braham
, C.
, and Fabbro
, R.
, 2003, “FEM Simulation of Residual Stresses Induced by Laser Peening
,” Eur. Phys. J. Appl. Phys.
, 23
(2
), pp. 83
–88
. 1286-004224.
Johnson
, J. N.
, 1972, “Calculation of Plane-Wave Propagation in Anisotropic Elastic-Plastic Solids
,” J. Appl. Phys.
0021-8979, 43
(5
), pp. 2074
–2082
.25.
Nemat-Nasser
, S.
, Okinaka
, T.
, Nesterenko
, V.
, and Liu
, M. Q.
, 1998, “Dynamic Void Collapse in Crystals: Computational Modelling and Experiments
,” Philos. Mag. A
0141-8610, 78
(5
), pp. 1151
–1174
.26.
Asaro
, R. J.
, 1983, “Micromechanics of Crystals and Polycrystals
,” Adv. Appl. Mech.
, 23
, pp. 1
–115
. 0065-215627.
Huang
, Y.
, 1991, “A User-Material Subroutine Incorporating Single Crystal Plasticity in the ABAQUS Finite Element Program
,” Division of Applied Sciences, Harvard University, Mech. Report No. 178.28.
Kysar
, J. W.
, 1997, “Addendum to a User-Material Subroutine Incorporating Single Crystal Plasticity in the ABAQUS Finite Element Program
,” Division of Applied Sciences, Harvard University, Mech. Report No. 178.29.
ABAQUS Theory Manual, 1997, Hibbitt, Karlsson and Sorensen, Inc.
30.
Zienkiewicz
, O. C.
, Taylor
, R. L.
, Zhu
, J. Z.
, and Knovel
, 2005.31.
Schmid
, E.
, 1931, “Articles on the Physics and Metallography of Magnesiums
,” Z. Elektrochem. Angew. Phys. Chem.
0372-8323, 37
, pp. 447
–459
.32.
Hutchinson
, J. W.
, 1976, “Bounds and Self-Consistent Estimates for Creep of Polycrystalline Materials
,” Proc. R. Soc. London, Ser. A
1364-5021, 348
(1652
), pp. 101
–127
.33.
Bassani
, J. L.
, and Wu
, T. Y.
, 1991, “Latent Hardening in Single-Crystals 2. Analytical Characterization and Predictions
,” Proc. R. Soc. London, Ser. A
0950-1207, 435
(1893
), pp. 21
–41
.34.
Cuitino
, A. M.
, and Ortiz
, M.
, 1993, “Computational Modeling of Single-Crystals
,” Modell. Simul. Mater. Sci. Eng.
0965-0393, 1
(3
), pp. 225
–263
.35.
Peirce
, D.
, Asaro
, R. J.
, and Needleman
, A.
, 1983, “Material Rate Dependence and Localized Deformation in Crystalline Solids
,” Acta Metall.
0001-6160, 31
(12
), pp. 1951
–1976
.36.
Noyan
, I. C.
, and Cohen
, J. B.
, 1987, Residual Stress: Measurement by Diffraction and Interpretation, Materials Research and Engineering
, Springer-Verlag
, New York
.37.
Achenbach
, J. D.
, 1975, Wave Propagation in Elastic Solids
(North-Holland Series in Applied Mathematics and Mechanics
), North-Holland
, Elsevier
, Amsterdam/New York
.38.
Tverdokhlebov
, A.
, and Rose
, J.
, 1988, “On Green-Functions for Elastic-Waves in Anisotropic Media
,” J. Acoust. Soc. Am.
0001-4966, 83
(1
), pp. 118
–121
.39.
Rose
, J. L.
, Balasubramaniam
, K.
, and Tverdokhlebov
, A.
, 1989, “A Numerical Integration Green's Function Model for Ultrasonic Field Profiles in Mildly Anisotropic Media
,” J. Nondestruct. Eval.
0195-9298, 8
(3
), pp. 165
–179
.40.
Kupperman
, D. S.
, Reimann
, K. J.
, and Abregolopez
, J.
, 1987, “Ultrasonic NDE of Cast Stainless-Steel
,” NDT Int.
, 20
(3
), pp. 145
–152
. 0963-869541.
Yeong
, P. Y.
, 1987, “Ultrasonic Characterization of Centrifugally Cast Stainless Steel
,” Ph.D. thesis, Palo Alto, CA.Copyright © 2009
by American Society of Mechanical Engineers
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