Effect of Nanosecond Pulse Laser Shock Peening on the Microstructure and Performance of Welded Joint of 316L Stainless Steel

  • Yuqin Li
  • Y. H. Li
  • X. D. Wang
  • W. S. Xu
  • F. D. Qiao
  • S. J. Wang
Conference paper
Part of the Lecture Notes in Mechanical Engineering book series (LNME)


The tensile stress and microstructure of 316L stainless steel welded joints are heterogeneous, and therefore the great risks of stress damage corrosion will be introduced. In the present study the welded joints were treated by laser shock peening (LSP) with different power density. Through residual stress test, microscopic analysis by XRD, SEM and TEM, the residual stress distribution, phase structure and microstructure were characterized, and the mechanism of LSP was discussed. The results showed that by the use of different power density, the residual tensile stress of welded joint decreased in comparison with welded sample. With the increasing of power density, these residual tensile stresses generated were superseded by the compressive residual stresses, and the maximum compressive residual stress reached about −100 MPa. By laser shock processing under different power density, the severe plastic deformation appeared in the surface layer of welded joint, high density nanocrystals and dislocation formed. However, there was difference for the plastic deformation characteristic among the three regions from weld seam, heat-affected zone, matrix zone, this should be accomplished by the interaction of the grain state, size and orientation with the laser shock peening. Moverover, the phase transformation from austenite to martensite was observed in the surface layer of welded joint, when the power density increased to 6.63 GW/cm2, while this is harmful for the improvement of stress corrosion resistance. Therefore, a specific laser power density is propitious to improve the residual compressive stress and microstructure of the weld joint, thus to gain better stress corrosion resistance.


Laser shock peening Different power density Welded joint Microstructure Performance 



The research was supported by the National Natural Science Foundation of China (51305456).


  1. 1.
    M. Wang, G. Michel, J.F. Jullien, Thermal simulation on the welding heat affected zone of 316L steel. J. Shanghai Jiaotong Univ. 35, 424–426 (2001)Google Scholar
  2. 2.
    X. Jijin, Effect of material hardening model on welding residual stresses of 316L stainless steel. Trans. China Weld. Inst. 35, 97–100 (2014)Google Scholar
  3. 3.
    S.Q. Han, W.H. Ma, Y.Q. Zhao et al., The submerged arc welding technology of 316 stainless sheet steel. Weld. Technol. 40, 51–53 (2011)Google Scholar
  4. 4.
    X. Xiangjiu, S. Wei, H. Chao, Study on welding procedure and joint properties of austenitic stainless steel 316L thick plate. Bloler Manuf. 45–47, 57 (2015)Google Scholar
  5. 5.
    J.Z. Lu, K.Y. Luo, D.K. Yang et al., Effects of laser peening on stress corrosion cracking (SCC) of ANSI 304 austenitic stainless steel. Corros. Sci. 3, 223–226 (2012)Google Scholar
  6. 6.
    P. Peyre, X. Scherpereel, L. Berthe et al., Surface modifications induced in 316L steel by laser peening and shot-peening: Influence on pitting corrosion resistance. Mater. Sci. Eng., A 280, 294–302 (2000)CrossRefGoogle Scholar
  7. 7.
    S. Lou, Y. Li, L. Zhou et al., Surface nanocrystallization of metallic alloy with different stacking fault energy induced by laser shock processing. Mater. Des. 104, 320–326 (2016)CrossRefGoogle Scholar
  8. 8.
    C. Wang, Y.Q. Xue, Y. Chai et al., Laser shock processing for improving fatigue property of k403 cast superalloy. High Power Laser Part. Beams 26, 26109001–26109005 (2014)Google Scholar
  9. 9.
    X. Ding-yuan, H. Wei-feng, J. Yang et al., Study on high cycle fatigue performance of TC17 titanium alloy improved by micry-scale laser shock processing. Laser Infrared 46, 1189–1194 (2016)Google Scholar
  10. 10.
    N. Xiang-fan, H. Wei-feng, Z. Shun-lai et al., Effects on structure and mechanical properties of TC11 titanium alloy by laser shock peening. J. Aerosp. Power 29, 321–327 (2014)Google Scholar
  11. 11.
    L. Jing, L. Jun, H. Weifeng et al., Improvement of wear resistance by laser shock processing and carburization composite technology used on 12CrNi3A steel. High Power Laser Part. Beams 26, 059005-1–059005-6 (2014)Google Scholar
  12. 12.
    S. Kalainathan, S. Sathyajith, S. Swaroop, Effect of laser shot peening without coating on the surface properties and corrosion behavior of 316L steel. Opt. Lasers Eng. 50, 1740–1745 (2012)CrossRefGoogle Scholar
  13. 13.
    M. Bang, Z. Jin, C. Zhimin, Effect of laser shock processing on residual stress of strain steel welded joints. High Power Laser Part. Beams 27, 089001-1–089001-6 (2015)Google Scholar
  14. 14.
    Y. Sano, M. Obata, T. Kubo et al., Retardation of crack initiation and growth in austenitic stainless steels by laser peening without protective coating. Mater. Sci. Eng., A 417, 334–340 (2006)CrossRefGoogle Scholar
  15. 15.
    Y. Sano, I. Chida, N. Mukai, Applications of Laser Peening without Protective Coating to Enhance Structural Integrity of Metallic Components, The Second International Conference on Laser Shock Peening (San Francisco, 2010)Google Scholar
  16. 16.
    X. Zhu, M. Zhou, Q. Dai et al., Deformation modes in stainless steel during laser shock peening. J. Manuf. Sci. Eng. 131, 054503 (2009)CrossRefGoogle Scholar
  17. 17.
    Y.Q. Li, X.D. Wang, F.L. Song et al., The effect of residual stress and microstructures on 316 stainless steel treated by LSP. Mater. Sci. Forum Hot Work. Technol. 42, 39–42 (2013)Google Scholar
  18. 18.
    J.Z. Lu, K.Y. Luo, D.K. Yang et al., Effects of laser peening on stress corrosion cracking(SCC) of ANSI 304 austenitic stainless steel. Corros. Sci. 60, 145–152 (2012)CrossRefGoogle Scholar
  19. 19.
    S. Li, The strength of aircraft and engine (National Defense Industry Press, Beijing, 2007)Google Scholar

Copyright information

© Springer Nature Singapore Pte Ltd. 2018

Authors and Affiliations

  • Yuqin Li
    • 1
  • Y. H. Li
    • 1
  • X. D. Wang
    • 1
  • W. S. Xu
    • 1
  • F. D. Qiao
    • 1
  • S. J. Wang
    • 1
  1. 1.Science and Technology on Plasma Dynamics LaboratoryAir Force Engineering UniversityXi’anChina

Personalised recommendations