Abstract
Laser shock processing (LSP), also known as laser peening, is a novel surface treatment technique in the past few years. Compressive residual stresses which imparted by LSP are very important for improving fatigue, corrosion and wear resistance of metals. Finite element analysis (FEA) simulation using ABAQUS software has been applied to predict residual stresses induced by LSP on Ti-6Al-4V titanium alloy with laser pulse duration 30 ns and water confined ablation mode. The residual stress field generated by different shape laser spots was studied, and the square laser spot is shown the most suitability for avoiding stress lack phenomenon and overlapping LSP. Surface residual stresses and plastically affected depth within single square spot both increased with the increase of laser intensity and laser shock times. Furthermore, compared with circle and ellipse spot, the residual stress distribution in overlapping square spots is very uniform only with small overlapping ratio. LSP with square spot can process advantageous residual stress field, and this technique will be used widely.
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Zou Shi-kun, Tan Yong-sheng, Guo Da-hao, Wang Sheng-bo, Wu Hong-xing. Effect of laser shock processing on mechanical properties of Al-Li alloy [J]. Chinese Journal of Lasers, 2004, 31(3): 371–373 (in Chinese).
Cao Zi-wen, Zou Shi-kun, Liu Fang-jun. Laser shock processing on 1Cr11Ni2W2MoV martensite steel [J]. Chinese Journal of Lasers, 2008, 35(2): 316–320 (in Chinese).
Chen H S, Lin R J, Ye J J. Using brillouin fiber-optic ring laser to provide base station with uplink optical carrier in a 10 GHz radio over fiber system [J]. Journal of Shanghai University (English Edition), 2009, 13(6): 450–453.
William B, Robert B. Finite element simulation of laser shock peenning [J]. International Journal of Fatigue, 1999, 21(7): 719–724.
Fabbro R, Peyre P, Berthe L. Physics and applications of laser-shock processing [J]. Journal of laser application, 1998, 10(6): 265–279.
Berthe L, Fabbro R, Eyre P. Shock waves from a water-confined laser-generated plasma [J]. Journal of Applied Physics, 1997, 82(6): 2826–2832.
Peyre P, Chaieb I, Braham C. FEM calculation of residual stresses induced by laser shock processing in stainless steels [J]. Modelling and Simulation in Materials Science and Engineering, 2007, 15(3): 205–221.
Fan Fa-fu, Duan Zhu-ping. Cylinder explosive test and material model of Johnson-Cook [J]. Mechanics in Engineering, 2003, 25(5): 40–43 (in Chinese).
Jean-Eric M, Gerard B. Laser generation of stress waves in metal [J]. Surface and Coatings Technology, 1995, 70(2): 231–234.
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Project supported by the Foundation of National Key Laboratory of Science and Technology on Power Beam Processing (Grant No.9140C4505020705)
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Cao, Zw., Che, Zg., Zou, Sk. et al. Numerical simulation of residual stress field induced by laser shock processing with square spot. J. Shanghai Univ.(Engl. Ed.) 15, 553–556 (2011). https://doi.org/10.1007/s11741-011-0785-1
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DOI: https://doi.org/10.1007/s11741-011-0785-1