Fundamental mechanisms of laser shock processing of metals and ceramics

Fei Wang, Xueliang Yan, Chenfei Zhang, Leimin Deng, Yongfeng Lu, Michael Nastasi, Bai Cui

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

Laser shock processing (LSP) is a novel surface engineering technique that utilizes a nanosecond pulse laser to generate plasma-driven shock waves, which can induce high compressive residual stresses extending to a depth of more than 1 mm from the surface. It has been widely applied to metallic components in aircrafts to improve the fatigue resistance. However, the fundamental mechanisms underlying the effects of LSP on the different materials and their performance remain poorly understood. This manuscript reviews the novel research studies by our team to use experimental approaches to understand the microstructural evolution in metal and ceramic materials during the LSP process, and elucidate the mechanisms that enable LSP to improve mechanical and irradiation properties. In austenitic steels, we discovered that the LSP-induced microstructures could improve the resistance to irradiation damage. The mechanisms are related to the defect sinks generated by LSP such as dislocations and twin boundaries. Compared to metals, LSP has not been widely applied to ceramics and its mechanisms on ceramics are less understood. LSP of alumina ceramics can induce localized plastic deformation near the surface and along grain boundaries. As a result, the mechanical properties of ceramic materials such as fracture toughness can be improved.

Original languageEnglish (US)
Title of host publicationAdvanced Laser Processing and Manufacturing II
EditorsMinghui Hong, Rongshi Xiao, Jian Liu
PublisherSPIE
ISBN (Electronic)9781510622241
DOIs
StatePublished - 2018
EventAdvanced Laser Processing and Manufacturing II 2018 - Beijing, China
Duration: Oct 11 2018Oct 13 2018

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume10813
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Other

OtherAdvanced Laser Processing and Manufacturing II 2018
CountryChina
CityBeijing
Period10/11/1810/13/18

Keywords

  • Laser shock processing
  • irradiation defect
  • laser peening
  • mechanical property
  • microstructure

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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  • Cite this

    Wang, F., Yan, X., Zhang, C., Deng, L., Lu, Y., Nastasi, M., & Cui, B. (2018). Fundamental mechanisms of laser shock processing of metals and ceramics. In M. Hong, R. Xiao, & J. Liu (Eds.), Advanced Laser Processing and Manufacturing II [108130Q] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 10813). SPIE. https://doi.org/10.1117/12.2501281