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Effects of laser shock peening on the mechanisms of fatigue short crack initiation and propagation of AA7075-T651

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dc.contributor.author Sanchez, AG
dc.contributor.author You, C
dc.contributor.author Leering, M
dc.contributor.author Glaser, Daniel
dc.contributor.author Furfari, D
dc.contributor.author Fitzpatrick, ME
dc.contributor.author Wharton, J
dc.contributor.author Reed, PAS
dc.date.accessioned 2021-05-25T17:15:49Z
dc.date.available 2021-05-25T17:15:49Z
dc.date.issued 2020-11
dc.identifier.citation Sanchez, A., You, C., Leering, M., Glaser, D., Furfari, D., Fitzpatrick, M., Wharton, J. & Reed, P. et al. 2020. Effects of laser shock peening on the mechanisms of fatigue short crack initiation and propagation of AA7075-T651. <i>International Journal of Fatigue, 143.</i> http://hdl.handle.net/10204/12019 en_ZA
dc.identifier.issn 0142-1123
dc.identifier.issn 1879-3452
dc.identifier.uri https://doi.org/10.1016/j.ijfatigue.2020.106025
dc.identifier.uri http://hdl.handle.net/10204/12019
dc.description.abstract A laser shock peening (LSP) treatment was performed on AA7075-T651 for maximum fatigue improvement. Surface and microstructural characterisation techniques (micro-hardness, SEM-EBSD, contact-profilometry) showed LSP surface modification was limited, and LSP generated deep compressive residual stresses above - 300 MPa. Fatigue testing showed a two-order magnitude increase in overall life, due to the mechanism of crack initiation changing from surface second-phase particles to subsurface crack initiation dependent on the local stress field. Modelling highlights the sensitive balance between surface roughness (including LSP-induced pits) and residual stress on the micro-mechanism of crack initiation, and how this can be used to maximise fatigue life extension. en_US
dc.format Abstract en_US
dc.language.iso en en_US
dc.relation.uri https://www.sciencedirect.com/science/article/pii/S0142112320305570 en_US
dc.source International Journal of Fatigue, 143 en_US
dc.subject Aluminium alloys en_US
dc.subject Fatigue initiation en_US
dc.subject Micromechanics en_US
dc.subject Surface flaws en_US
dc.title Effects of laser shock peening on the mechanisms of fatigue short crack initiation and propagation of AA7075-T651 en_US
dc.type Article en_US
dc.description.pages 14 en_US
dc.description.note © 2020 Elsevier Ltd. All rights reserved. Due to copyright restrictions, the attached PDF file only contains the abstract of the full text item. For access to the full text item, kindly consult the publisher's website: https://www.sciencedirect.com/science/article/pii/S0142112320305570 en_US
dc.description.cluster Manufacturing en_US
dc.description.impactarea Laser Enabled Manufacturing en_US
dc.identifier.apacitation Sanchez, A., You, C., Leering, M., Glaser, D., Furfari, D., Fitzpatrick, M., ... Reed, P. (2020). Effects of laser shock peening on the mechanisms of fatigue short crack initiation and propagation of AA7075-T651. <i>International Journal of Fatigue, 143</i>, http://hdl.handle.net/10204/12019 en_ZA
dc.identifier.chicagocitation Sanchez, AG, C You, M Leering, Daniel Glaser, D Furfari, ME Fitzpatrick, J Wharton, and PAS Reed "Effects of laser shock peening on the mechanisms of fatigue short crack initiation and propagation of AA7075-T651." <i>International Journal of Fatigue, 143</i> (2020) http://hdl.handle.net/10204/12019 en_ZA
dc.identifier.vancouvercitation Sanchez A, You C, Leering M, Glaser D, Furfari D, Fitzpatrick M, et al. Effects of laser shock peening on the mechanisms of fatigue short crack initiation and propagation of AA7075-T651. International Journal of Fatigue, 143. 2020; http://hdl.handle.net/10204/12019. en_ZA
dc.identifier.ris TY - Article AU - Sanchez, AG AU - You, C AU - Leering, M AU - Glaser, Daniel AU - Furfari, D AU - Fitzpatrick, ME AU - Wharton, J AU - Reed, PAS AB - A laser shock peening (LSP) treatment was performed on AA7075-T651 for maximum fatigue improvement. Surface and microstructural characterisation techniques (micro-hardness, SEM-EBSD, contact-profilometry) showed LSP surface modification was limited, and LSP generated deep compressive residual stresses above - 300 MPa. Fatigue testing showed a two-order magnitude increase in overall life, due to the mechanism of crack initiation changing from surface second-phase particles to subsurface crack initiation dependent on the local stress field. Modelling highlights the sensitive balance between surface roughness (including LSP-induced pits) and residual stress on the micro-mechanism of crack initiation, and how this can be used to maximise fatigue life extension. DA - 2020-11 DB - ResearchSpace DP - CSIR J1 - International Journal of Fatigue, 143 KW - Aluminium alloys KW - Fatigue initiation KW - Micromechanics KW - Surface flaws LK - https://researchspace.csir.co.za PY - 2020 SM - 0142-1123 SM - 1879-3452 T1 - Effects of laser shock peening on the mechanisms of fatigue short crack initiation and propagation of AA7075-T651 TI - Effects of laser shock peening on the mechanisms of fatigue short crack initiation and propagation of AA7075-T651 UR - http://hdl.handle.net/10204/12019 ER - en_ZA
dc.identifier.worklist 24462 en_US


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