Analysis of Residual Stresses in Laser-Shock-Peened and Shot-Peened Marine Steel Welds

Research output: Contribution to journalArticle

8 Citations (Scopus)
119 Downloads (Pure)

Abstract

Laser peening is now the preferred method of surface treatment in many applications. The magnitude and depth of the compressive residual stress induced by laser peening can be influenced strongly by the number of peen layers (the number of laser hits at each point) and by processing conditions including the use of a protective ablative layer. In this study, residual stresses have been characterized in laser and shot-peened marine butt welds with a particular focus at the fatigue crack initiation location at the weld toe. X-ray diffraction, synchrotron X-ray diffraction, incremental center-hole drilling, and the contour method were used for determination of residual stress. Results showed that the use of ablative tape increased the surface compressive stress, and the depth of compressive stress increased with an increase in number of peening layers. A key result is that variation of residual stress profile across laser peen spots was seen, and the residual stress magnitude varies between the center and edges of the spots.

Published Statement: The final publication is available at Springer via http://dx.doi.org/10.1007/s11661-016-3867-y
Original languageEnglish
Pages (from-to)759-770
Number of pages12
JournalMetallurgical and Materials Transactions A
Volume48
Issue number2
Early online date21 Nov 2016
DOIs
Publication statusPublished - Feb 2017

Fingerprint

Steel
shot
residual stress
Residual stresses
peening
Welds
shock
Shot peening
steels
Compressive stress
Lasers
lasers
X ray diffraction
crack initiation
surface treatment
Synchrotrons
drilling
diffraction
Crack initiation
Tapes

Bibliographical note

A read-only copy of the paper can be found here: http://rdcu.be/ot8u

Keywords

  • Residual stress
  • Laser peening
  • shot peening
  • contour method
  • synchrotron X-Ray diffraction

Cite this

@article{64cc0f6275c94db596b4664a79eea22a,
title = "Analysis of Residual Stresses in Laser-Shock-Peened and Shot-Peened Marine Steel Welds",
abstract = "Laser peening is now the preferred method of surface treatment in many applications. The magnitude and depth of the compressive residual stress induced by laser peening can be influenced strongly by the number of peen layers (the number of laser hits at each point) and by processing conditions including the use of a protective ablative layer. In this study, residual stresses have been characterized in laser and shot-peened marine butt welds with a particular focus at the fatigue crack initiation location at the weld toe. X-ray diffraction, synchrotron X-ray diffraction, incremental center-hole drilling, and the contour method were used for determination of residual stress. Results showed that the use of ablative tape increased the surface compressive stress, and the depth of compressive stress increased with an increase in number of peening layers. A key result is that variation of residual stress profile across laser peen spots was seen, and the residual stress magnitude varies between the center and edges of the spots.Published Statement: The final publication is available at Springer via http://dx.doi.org/10.1007/s11661-016-3867-y",
keywords = "Residual stress, Laser peening, shot peening, contour method, synchrotron X-Ray diffraction",
author = "Bilal Ahmed and Fitzpatrick, {Michael E.}",
note = "A read-only copy of the paper can be found here: http://rdcu.be/ot8u",
year = "2017",
month = "2",
doi = "10.1007/s11661-016-3867-y",
language = "English",
volume = "48",
pages = "759--770",
journal = "Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science",
issn = "1073-5623",
publisher = "Springer Verlag",
number = "2",

}

TY - JOUR

T1 - Analysis of Residual Stresses in Laser-Shock-Peened and Shot-Peened Marine Steel Welds

AU - Ahmed, Bilal

AU - Fitzpatrick, Michael E.

N1 - A read-only copy of the paper can be found here: http://rdcu.be/ot8u

PY - 2017/2

Y1 - 2017/2

N2 - Laser peening is now the preferred method of surface treatment in many applications. The magnitude and depth of the compressive residual stress induced by laser peening can be influenced strongly by the number of peen layers (the number of laser hits at each point) and by processing conditions including the use of a protective ablative layer. In this study, residual stresses have been characterized in laser and shot-peened marine butt welds with a particular focus at the fatigue crack initiation location at the weld toe. X-ray diffraction, synchrotron X-ray diffraction, incremental center-hole drilling, and the contour method were used for determination of residual stress. Results showed that the use of ablative tape increased the surface compressive stress, and the depth of compressive stress increased with an increase in number of peening layers. A key result is that variation of residual stress profile across laser peen spots was seen, and the residual stress magnitude varies between the center and edges of the spots.Published Statement: The final publication is available at Springer via http://dx.doi.org/10.1007/s11661-016-3867-y

AB - Laser peening is now the preferred method of surface treatment in many applications. The magnitude and depth of the compressive residual stress induced by laser peening can be influenced strongly by the number of peen layers (the number of laser hits at each point) and by processing conditions including the use of a protective ablative layer. In this study, residual stresses have been characterized in laser and shot-peened marine butt welds with a particular focus at the fatigue crack initiation location at the weld toe. X-ray diffraction, synchrotron X-ray diffraction, incremental center-hole drilling, and the contour method were used for determination of residual stress. Results showed that the use of ablative tape increased the surface compressive stress, and the depth of compressive stress increased with an increase in number of peening layers. A key result is that variation of residual stress profile across laser peen spots was seen, and the residual stress magnitude varies between the center and edges of the spots.Published Statement: The final publication is available at Springer via http://dx.doi.org/10.1007/s11661-016-3867-y

KW - Residual stress

KW - Laser peening

KW - shot peening

KW - contour method

KW - synchrotron X-Ray diffraction

U2 - 10.1007/s11661-016-3867-y

DO - 10.1007/s11661-016-3867-y

M3 - Article

VL - 48

SP - 759

EP - 770

JO - Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science

JF - Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science

SN - 1073-5623

IS - 2

ER -