dc.contributor.author |
Glaser, Daniel
|
|
dc.contributor.author |
Polese, C
|
|
dc.contributor.author |
Venter, AM
|
|
dc.contributor.author |
Marais, D
|
|
dc.contributor.author |
Plaisier, JR
|
|
dc.date.accessioned |
2022-03-22T07:54:11Z |
|
dc.date.available |
2022-03-22T07:54:11Z |
|
dc.date.issued |
2022-03 |
|
dc.identifier.citation |
Glaser, D., Polese, C., Venter, A., Marais, D. & Plaisier, J. 2022. Evaluation of laser shock peening process parameters incorporating Almen strip deflections. <i>Surface and Coatings Technology, 434.</i> http://hdl.handle.net/10204/12340 |
en_ZA |
dc.identifier.issn |
0257-8972 |
|
dc.identifier.issn |
1879-3347 |
|
dc.identifier.uri |
http://hdl.handle.net/10204/12340
|
|
dc.description.abstract |
Engineering of component surfaces using Laser Shock Peening (LSP) requires optimisation of key process parameters to enhance performance through the generation of beneficial compressive residual stresses. Quantification of residual stress fields typically requires considerable experimental resources involving multiple complementary techniques to obtain reliable measurements through the depth of the target material. LSP induced plastic strains lead to the formation of residual stresses and cause deformation of thin components. This effect is routinely used in the assessment of mechanical Shot Peening (SP) where distortion coupons, called Almen strips, correlate the peening intensity to process parameters. This study explores the extension of this Almen strip concept to facilitate the quick assessment of LSP parameters for aluminium alloy 6056-T4 aeronautical structural applications. Direct measurements of the resulting LSP residual stresses have been performed using Synchrotron X-Ray Diffraction, Neutron Diffraction, and Incremental Hole Drilling, complemented by analyses of surface integrity and sub-surface modifications. It has been found that the attained near-surface compressive residual stress values and depths are strongly dependent on laser power intensity and spot coverage, whilst surface roughness and microhardness are mostly independent of the LSP parameters. Optimal parameter selection should therefore be primarily focused on the required residual stress field. A direct correlation has been observed between the magnitudes of LSP Almen distortions and the residual stresses. This qualifies extending the deflection based approach to be used as a quick, simple and effective qualitative screening technique of LSP process parameters, such as the laser power intensity saturation. |
en_US |
dc.format |
Abstract |
en_US |
dc.language.iso |
en |
en_US |
dc.relation.uri |
https://www.sciencedirect.com/science/article/pii/S0257897222000792 |
en_US |
dc.source |
Surface and Coatings Technology, 434 |
en_US |
dc.subject |
Almen strip |
en_US |
dc.subject |
Deflection methods |
en_US |
dc.subject |
Incremental hole drilling |
en_US |
dc.subject |
Laser shock peening |
en_US |
dc.subject |
Neutron diffraction |
en_US |
dc.subject |
Synchrotron XRD residual stress |
en_US |
dc.title |
Evaluation of laser shock peening process parameters incorporating Almen strip deflections |
en_US |
dc.type |
Article |
en_US |
dc.description.pages |
13 |
en_US |
dc.description.note |
© 2022 Elsevier B.V. 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, please consult the publisher's website: https://www.sciencedirect.com/science/article/pii/S0257897222000792 |
en_US |
dc.description.cluster |
Manufacturing |
en_US |
dc.description.impactarea |
Laser Enabled Manufacturing |
en_US |
dc.identifier.apacitation |
Glaser, D., Polese, C., Venter, A., Marais, D., & Plaisier, J. (2022). Evaluation of laser shock peening process parameters incorporating Almen strip deflections. <i>Surface and Coatings Technology, 434</i>, http://hdl.handle.net/10204/12340 |
en_ZA |
dc.identifier.chicagocitation |
Glaser, Daniel, C Polese, AM Venter, D Marais, and JR Plaisier "Evaluation of laser shock peening process parameters incorporating Almen strip deflections." <i>Surface and Coatings Technology, 434</i> (2022) http://hdl.handle.net/10204/12340 |
en_ZA |
dc.identifier.vancouvercitation |
Glaser D, Polese C, Venter A, Marais D, Plaisier J. Evaluation of laser shock peening process parameters incorporating Almen strip deflections. Surface and Coatings Technology, 434. 2022; http://hdl.handle.net/10204/12340. |
en_ZA |
dc.identifier.ris |
TY - Article
AU - Glaser, Daniel
AU - Polese, C
AU - Venter, AM
AU - Marais, D
AU - Plaisier, JR
AB - Engineering of component surfaces using Laser Shock Peening (LSP) requires optimisation of key process parameters to enhance performance through the generation of beneficial compressive residual stresses. Quantification of residual stress fields typically requires considerable experimental resources involving multiple complementary techniques to obtain reliable measurements through the depth of the target material. LSP induced plastic strains lead to the formation of residual stresses and cause deformation of thin components. This effect is routinely used in the assessment of mechanical Shot Peening (SP) where distortion coupons, called Almen strips, correlate the peening intensity to process parameters. This study explores the extension of this Almen strip concept to facilitate the quick assessment of LSP parameters for aluminium alloy 6056-T4 aeronautical structural applications. Direct measurements of the resulting LSP residual stresses have been performed using Synchrotron X-Ray Diffraction, Neutron Diffraction, and Incremental Hole Drilling, complemented by analyses of surface integrity and sub-surface modifications. It has been found that the attained near-surface compressive residual stress values and depths are strongly dependent on laser power intensity and spot coverage, whilst surface roughness and microhardness are mostly independent of the LSP parameters. Optimal parameter selection should therefore be primarily focused on the required residual stress field. A direct correlation has been observed between the magnitudes of LSP Almen distortions and the residual stresses. This qualifies extending the deflection based approach to be used as a quick, simple and effective qualitative screening technique of LSP process parameters, such as the laser power intensity saturation.
DA - 2022-03
DB - ResearchSpace
DP - CSIR
J1 - Surface and Coatings Technology, 434
KW - Almen strip
KW - Deflection methods
KW - Incremental hole drilling
KW - Laser shock peening
KW - Neutron diffraction
KW - Synchrotron XRD residual stress
LK - https://researchspace.csir.co.za
PY - 2022
SM - 0257-8972
SM - 1879-3347
T1 - Evaluation of laser shock peening process parameters incorporating Almen strip deflections
TI - Evaluation of laser shock peening process parameters incorporating Almen strip deflections
UR - http://hdl.handle.net/10204/12340
ER -
|
en_ZA |
dc.identifier.worklist |
25505 |
en_US |