Residual stress and microhardness increasing induced by two-sided laser shock processing

Gerontiy Sakhvadze1 , Alexander Shokhin2 , Omar Kikvidze3

1, 2Blagonravov Institute of Machines Science, Russian Academy of Sciences, Moscow, Russia

3Tsereteli State University, Kutaisi, Georgia

1Corresponding author

Vibroengineering PROCEDIA, Vol. 8, 2016, p. 434-439.
Received 26 July 2016; accepted 3 September 2016; published 7 October 2016

Copyright © 2016 JVE International Ltd. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Abstract.

Two-sided laser shock processing (TSLSP) is often employed to improve the surface quality of thin section components, which can reduce excessive plastic deformation induced by one-sided laser shock processing. Residual stresses (RS) field induced in a thin Ti-6Al-4V alloy plate by TSLSP was investigated through numerical simulation. The multiple TSLSP impacts and the increasing laser shock pressure were found to have significant effects on the RS field. Microhardness distribution on the section of specimen, calculated from RS by Carlsson-Larsson model, is analyzed

Keywords: two-sided laser shock processing (TSLSP), finite element method (FEM), residual stresses (RS) field, microhardness, shock wave pressure, multiple laser shocks.

Acknowledgements

The work is financially supported by the Ministry of Education and Sciences of the Russian Federation within the federal target Program “Studies and Developments of Promising Trends in Russia’s Science and Technology Sector for 2014-2020”. Subsidy Agreement No. 14.607.21.0040 of July 22, 2014, Project RFMEFI60714X0040.

References

  1. Peyre P., Scherpereel X., Berthe L., Fabbro R. Current trends in laser shock processing. Surface Engineering, Vol. 14, 1998, p. 377-380. [CrossRef]
  2. Zhang Y. K., Lu J. Z., Ren X. D., Yao H. B., Yao H. X. Effect of laser shock processing on the mechanical properties and fatigue lives of the turbojet engine blades manufactured by LY2 Al alloy. Materials and Design, Vol. 30, Issue 5, 2009, p. 1697-1703. [CrossRef]
  3. Ocana J. L., Morales M., Porro J. A., Dнaz M., Ruiz de Lara L., Correa C., et al. Induction of Thermo-Mechanical Residual Stresses in Metallic Materials by Laser Shock Processing. Encyclopedia of Thermal Stresses, 2014, p. 2427-2444. [CrossRef]
  4. Hu Yongxiang, Yao Zhenqiang Numerical simulation and experimentation of overlapping laser shock processing with symmetry cell. International Journal of Machine Tools and Manufacture, Vol. 48, 2008, p. 152-162. [CrossRef]
  5. Sakhvadze G. Zh., Gavrilina L. V. Single and multiple laser shock processing of materials. Journal of Machinery Manufacture and Reliability, Vol. 6, 2015, p. 75-80. [CrossRef]
  6. Sakhvadze G. Zh., Gavrilina L. V., Kikvidze O. G. Influence of laser spot overlap effect on residual stresses during laser-shock-wave processing of materials. Journal of Machinery Manufacture and Reliability, Vol. 3, 2016, p. 258-265. [CrossRef]
  7. Sakhvadze G. J. Laser shock processing of materials to produce nanostructures. Special Issue of Scientific Journal of IFToMM “Problems of Mechanics”. Vol. 2, Issue 55, 2014, p. 68-73. [CrossRef]
  8. Johnson G. R., Cook W. H. A constitutive model and data for metals subjected to large strains, high strain rates and high temperatures. Proceedings of the 7th International Symposium on Ballistics, The Hague, 1983, p. 541-547. [CrossRef]
  9. Carlsson S., Larsson P. L. On the determination of residual stress and strain fields by sharp indentation testing. Part 1: theoretical and numerical analysis. Acta Materialia, Vol. 49, 2001, p. 2179-2191. [CrossRef]