Fabrication and finite element analysis of micro dents using μ-laser shock peening

Michael P. Sealy, Y. B. Guo, M. F. Horstemeyer

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

Abstract

Laser shock peening (LSP) is an innovative surface treatment developed to improve surface integrity. This study explores the feasibility using LSP to direct-write surface micro dents for lubricant retention. Since LSP is a highly transient process with a pulse duration of 10 - 100 ns, a real time in-situ measurement of laser/material interaction such as transient stresses/strains is challenging. Therefore, a 3D finite element simulation of micro-scale laser shock peening was developed to determine the effect of laser pulse duration and peak pressure on the transient material behaviors of titanium Ti-6A1-4V. The simulated dent geometry is similar to the measured dent geometry in terms of morphology. The results suggested there is an optimal peening time that produces the deepest dent. The maximum transient stress in peening direction occurred at a certain laser pulse time. However, the stress along the depth and radius were drastically affected by the peak pressures.

Original languageEnglish (US)
Title of host publicationProceedings of the ASME International Manufacturing Science and Engineering Conference, MSEC2008
Pages237-244
Number of pages8
DOIs
StatePublished - 2009
EventASME International Manufacturing Science and Engineering Conference, MSEC2008 - Evanston, IL, United States
Duration: Oct 7 2008Oct 10 2008

Publication series

NameProceedings of the ASME International Manufacturing Science and Engineering Conference, MSEC2008
Volume1

Conference

ConferenceASME International Manufacturing Science and Engineering Conference, MSEC2008
CountryUnited States
CityEvanston, IL
Period10/7/0810/10/08

ASJC Scopus subject areas

  • Industrial and Manufacturing Engineering
  • Mechanical Engineering

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  • Cite this

    Sealy, M. P., Guo, Y. B., & Horstemeyer, M. F. (2009). Fabrication and finite element analysis of micro dents using μ-laser shock peening. In Proceedings of the ASME International Manufacturing Science and Engineering Conference, MSEC2008 (pp. 237-244). (Proceedings of the ASME International Manufacturing Science and Engineering Conference, MSEC2008; Vol. 1). https://doi.org/10.1115/MSEC_ICMP2008-72231