Fatigue crack growth in a laser shock peened residual stress field

M. Pavan; D. Furfari; B. Ahmad; M. A. Gharghouri; M. E. Fitzpatrick

doi:10.1016/j.ijfatigue.2019.01.020

Fatigue crack growth in a laser shock peened residual stress field

M. Pavan, D. Furfari, B. Ahmad, M. A. Gharghouri, M. E. Fitzpatrick

College of Engineering, Environment & Science

Research output: Contribution to journal › Article › peer-review

84 Citations (Scopus)

348 Downloads (Pure)

Abstract

Laser Shock Peening is a surface treatment technique used in the aerospace sector to increase fatigue life, as well as resistance to fretting fatigue and stress corrosion cracking. In this study, laser shock peening was applied to a 6-mm-thick middle-crack tension specimen made of aluminium 2524-T351. Residual stress was measured with neutron diffraction and the contour method, along the predicted crack path prior to fatigue testing. Fatigue crack growth test results showed that fatigue life improved by a factor of 4 compared to an untreated component, owing to a significant crack growth rate reduction inside the laser peened area. A linear-elastic finite-element crack growth prediction model was also developed, obtaining predicted results in excellent agreement with the experimental data.

Original language	English
Pages (from-to)	157-167
Number of pages	11
Journal	International Journal of Fatigue
Volume	123
Early online date	31 Jan 2019
DOIs	https://doi.org/10.1016/j.ijfatigue.2019.01.020
Publication status	Published - 1 Jun 2019

Bibliographical note

NOTICE: this is the author’s version of a work that was accepted for publication in International Journal of Fatigue. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in International Journal of Fatigue, [123], (2019)
DOI: 10.1016/j.ijfatigue.2019.01.020

© 2017, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/

Keywords

Crack growth
Crack growth modelling
Fatigue
Laser peening
Residual stress

ASJC Scopus subject areas

Modelling and Simulation
General Materials Science
Mechanics of Materials
Mechanical Engineering
Industrial and Manufacturing Engineering

Access to Document

10.1016/j.ijfatigue.2019.01.020

Post-PrintAccepted author manuscript, 2.37 MBLicence: CC BY-NC-ND

Cite this

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abstract = "Laser Shock Peening is a surface treatment technique used in the aerospace sector to increase fatigue life, as well as resistance to fretting fatigue and stress corrosion cracking. In this study, laser shock peening was applied to a 6-mm-thick middle-crack tension specimen made of aluminium 2524-T351. Residual stress was measured with neutron diffraction and the contour method, along the predicted crack path prior to fatigue testing. Fatigue crack growth test results showed that fatigue life improved by a factor of 4 compared to an untreated component, owing to a significant crack growth rate reduction inside the laser peened area. A linear-elastic finite-element crack growth prediction model was also developed, obtaining predicted results in excellent agreement with the experimental data.",

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AU - Ahmad, B.

AU - Gharghouri, M. A.

AU - Fitzpatrick, M. E.

N1 - NOTICE: this is the author’s version of a work that was accepted for publication in International Journal of Fatigue. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in International Journal of Fatigue, [123], (2019) DOI: 10.1016/j.ijfatigue.2019.01.020 © 2017, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/

PY - 2019/6/1

Y1 - 2019/6/1

N2 - Laser Shock Peening is a surface treatment technique used in the aerospace sector to increase fatigue life, as well as resistance to fretting fatigue and stress corrosion cracking. In this study, laser shock peening was applied to a 6-mm-thick middle-crack tension specimen made of aluminium 2524-T351. Residual stress was measured with neutron diffraction and the contour method, along the predicted crack path prior to fatigue testing. Fatigue crack growth test results showed that fatigue life improved by a factor of 4 compared to an untreated component, owing to a significant crack growth rate reduction inside the laser peened area. A linear-elastic finite-element crack growth prediction model was also developed, obtaining predicted results in excellent agreement with the experimental data.

AB - Laser Shock Peening is a surface treatment technique used in the aerospace sector to increase fatigue life, as well as resistance to fretting fatigue and stress corrosion cracking. In this study, laser shock peening was applied to a 6-mm-thick middle-crack tension specimen made of aluminium 2524-T351. Residual stress was measured with neutron diffraction and the contour method, along the predicted crack path prior to fatigue testing. Fatigue crack growth test results showed that fatigue life improved by a factor of 4 compared to an untreated component, owing to a significant crack growth rate reduction inside the laser peened area. A linear-elastic finite-element crack growth prediction model was also developed, obtaining predicted results in excellent agreement with the experimental data.

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KW - Residual stress

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ER -

Fatigue crack growth in a laser shock peened residual stress field

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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