0
Research Papers: Design and Analysis

Influence of Laser Peening Parameters on Residual Stress Field of 304 Stainless Steel

[+] Author and Article Information
Xiang Ling

School of Mechanical and Power Engineering, Nanjing University of Technology, 5 Xin Mo Fan Road, Jiangsu, Nanjing, 210009, P.R.C.xling@njut.edu.cn

Weiwei Peng

School of Mechanical and Power Engineering, Nanjing University of Technology, 5 Xin Mo Fan Road, Jiangsu, Nanjing, 210009, P.R.C.yuwei0492@126.com

Gang Ma

School of Mechanical and Power Engineering, Nanjing University of Technology, 5 Xin Mo Fan Road, Jiangsu, Nanjing, 210009, P.R.C.gmnjut@163.com

1

Corresponding author.

J. Pressure Vessel Technol 130(2), 021201 (Mar 10, 2008) (8 pages) doi:10.1115/1.2891914 History: Received October 07, 2006; Revised November 17, 2007; Published March 10, 2008

A nonlinear elastic-plastic finite element method is established to predict the residual compressive stress distribution induced by laser peening (LP) in AISI 304 stainless steel. The dynamic material property at a high strain rate (106s) is considered when building the two-dimensional finite element model. Effects of the laser power density, laser spot size, laser pulse duration, multiple LP processes, and one-/two-sided peening on the compressive stress field in the stainless steel are evaluated for optimizing the process. The numerical results have a good agreement with the data by x-ray diffraction method, and the compressive stresses induced by LP are greater than the tensile residual stresses that result from the welding process. Peening, in general, is an effective method for protecting stainless steel weldments against stress corrosion crack (SCC). The present work provides the basis for studying the mechanism on enhancing the SCC resistance in the weld joint of Type 304 stainless steel by LP.

FIGURES IN THIS ARTICLE
<>
Copyright © 2008 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Figure 1

Confined plasma configuration

Grahic Jump Location
Figure 2

FEA model used for LP

Grahic Jump Location
Figure 3

Energy time history during shock (FEA results)

Grahic Jump Location
Figure 4

Pressure-time history during shock

Grahic Jump Location
Figure 5

Residual stress distribution of the thick target after single LP (FEA results)

Grahic Jump Location
Figure 6

Residual stress distribution of the thin target after single LP (FEA results)

Grahic Jump Location
Figure 7

Distribution of residual stresses with different initial residual stress supposed (FEA results)

Grahic Jump Location
Figure 8

Distribution of residual stresses (σr) with different impact pressure (FEA results)

Grahic Jump Location
Figure 9

Distribution of residual stresses (σr) with different laser spot sizes (FEA results)

Grahic Jump Location
Figure 10

Distribution of residual stresses (σr) with different laser pulse durations (FEA results)

Grahic Jump Location
Figure 11

Distribution of residual stresses (σr) for multiple LP impacts (FEA results)

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In