Laser shock peening (LSP) under water confinement regime involves several complicated physical phenomena. Among these phenomena, the interaction between laser and coating material during LSP is very important to the laser-induced residual stress, which has an important effect on the fatigue and corrosion properties of the substrate material. To gain a better understanding of this interaction, a series of experiments, including single shot, single-track overlapping, and multitrack overlapping LSP, has been carried out on various metals with different coatings. A 3D finite element model has also been developed to simulate the LSP process. Combining this with a previously developed confined plasma model, which has been verified by the experimental data from literature, the 3D finite element model is used to predict the residual stresses induced in the substrate material as well as the indentation profile on the substrate surface. The model prediction of indentation profiles is compared with the experimental data. The residual stresses in the depth direction are also validated against the X-ray diffraction measurement data for 4140 steel and Ti–6Al–4V, and good agreements are obtained for both predictions. The effect of process parameters on the residual stress is also investigated both experimentally and theoretically.
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December 2010
Research Papers
Parametric Study on Single Shot and Overlapping Laser Shock Peening on Various Metals via Modeling and Experiments
Yunfeng Cao,
Yunfeng Cao
Graduate Research Assistant
Center for Laser-Based Manufacturing, School of Mechanical Engineering,
Purdue University
, West Lafayette, IN 47907
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Yung C. Shin,
Yung C. Shin
Fellow ASME
Center for Laser-Based Manufacturing, School of Mechanical Engineering,
Purdue University
, West Lafayette, IN 47907
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Benxin Wu
Benxin Wu
Assistant Professor
Department of Mechanical, Materials and Aerospace Engineering,
Illinois Institute of Technology
, Chicago, IL 60616
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Yunfeng Cao
Graduate Research Assistant
Center for Laser-Based Manufacturing, School of Mechanical Engineering,
Purdue University
, West Lafayette, IN 47907
Yung C. Shin
Fellow ASME
Center for Laser-Based Manufacturing, School of Mechanical Engineering,
Purdue University
, West Lafayette, IN 47907
Benxin Wu
Assistant Professor
Department of Mechanical, Materials and Aerospace Engineering,
Illinois Institute of Technology
, Chicago, IL 60616J. Manuf. Sci. Eng. Dec 2010, 132(6): 061010 (10 pages)
Published Online: November 10, 2010
Article history
Received:
January 20, 2010
Revised:
October 12, 2010
Online:
November 10, 2010
Published:
November 10, 2010
Citation
Cao, Y., Shin, Y. C., and Wu, B. (November 10, 2010). "Parametric Study on Single Shot and Overlapping Laser Shock Peening on Various Metals via Modeling and Experiments." ASME. J. Manuf. Sci. Eng. December 2010; 132(6): 061010. https://doi.org/10.1115/1.4002850
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