Development in laser peening of advanced ceramic

Hdl Handle:
http://hdl.handle.net/10034/600515
Title:
Development in laser peening of advanced ceramic
Authors:
Shukla, Pratik; Smith, Graham C.; Waugh, David G.; Lawrence, Jonathan
Abstract:
Laser peening is a well-known process applicable to surface treat metals and alloys in various industrial sectors. Research in the area of laser peening of ceramics is still scarce and a complete laser-ceramic interaction is still unreported. This paper focuses on laser peening of SiC ceramics employed for cutting tools, armor plating, dental and biomedical implants, with a view to elucidate the unreported work. A detailed investigation was conducted with 1064nm Nd:YAG ns pulse laser to first understand the surface effects, namely: the topography, hardness, KIc and the microstructure of SiC advanced ceramics. The results showed changes in surface roughness and microstructural modification after laser peening. An increase in surface hardness was found by almost 2 folds, as the diamond footprints and its flaws sizes were considerably reduced, thus, enhancing the resistance of SiC to better withstand mechanical impact. This inherently led to an enhancement in the KIc by about 42%. This is attributed to an induction of compressive residual stress and phase transformation. This work is a first-step towards the development of a 3-dimensional laser peening technique to surface treat many advanced ceramic components. This work has shown that upon tailoring the laser peening parameters may directly control ceramic topography, microstructure, hardness and the KIc. This is useful for increasing the performance of ceramics used for demanding applications particularly where it matters such as in military. Upon successful peening of bullet proof vests could result to higher ballistic strength and resistance against higher sonic velocity, which would not only prevent serious injuries, but could also help to save lives of soldiers on the battle fields.
Affiliation:
University of Chester Laser Engineering & Manufacturing Research Group (Shukla, Waugh, Lawrence); University of Chester Department of Natural Sciences (Smith)
Citation:
Shukla, P., Smith, G. C., Waugh, D. G. & Lawrence, J. (2015). Development in laser peening of advanced ceramic. Proceedings of SPIE, 9657, 77-85. http://dx.doi.org/10.1117/12.2182435
Publisher:
SPIE (International Society for Optics and Photonics)
Journal:
Proceedings of SPIE
Publication Date:
1-Jul-2015
URI:
http://hdl.handle.net/10034/600515
DOI:
10.1117/12.2182435
Additional Links:
http://spie.org/Publications/Proceedings/Paper/10.1117/12.2182435?origin_id=x4325&start_volume_number=9600
Type:
Article
Language:
en
Appears in Collections:
Natural Sciences

Full metadata record

DC FieldValue Language
dc.contributor.authorShukla, Pratiken
dc.contributor.authorSmith, Graham C.en
dc.contributor.authorWaugh, David G.en
dc.contributor.authorLawrence, Jonathanen
dc.date.accessioned2016-03-03T09:55:11Zen
dc.date.available2016-03-03T09:55:11Zen
dc.date.issued2015-07-01en
dc.identifier.citationShukla, P., Smith, G. C., Waugh, D. G. & Lawrence, J. (2015). Development in laser peening of advanced ceramic. Proceedings of SPIE, 9657, 77-85. http://dx.doi.org/10.1117/12.2182435en
dc.identifier.doi10.1117/12.2182435en
dc.identifier.urihttp://hdl.handle.net/10034/600515en
dc.description.abstractLaser peening is a well-known process applicable to surface treat metals and alloys in various industrial sectors. Research in the area of laser peening of ceramics is still scarce and a complete laser-ceramic interaction is still unreported. This paper focuses on laser peening of SiC ceramics employed for cutting tools, armor plating, dental and biomedical implants, with a view to elucidate the unreported work. A detailed investigation was conducted with 1064nm Nd:YAG ns pulse laser to first understand the surface effects, namely: the topography, hardness, KIc and the microstructure of SiC advanced ceramics. The results showed changes in surface roughness and microstructural modification after laser peening. An increase in surface hardness was found by almost 2 folds, as the diamond footprints and its flaws sizes were considerably reduced, thus, enhancing the resistance of SiC to better withstand mechanical impact. This inherently led to an enhancement in the KIc by about 42%. This is attributed to an induction of compressive residual stress and phase transformation. This work is a first-step towards the development of a 3-dimensional laser peening technique to surface treat many advanced ceramic components. This work has shown that upon tailoring the laser peening parameters may directly control ceramic topography, microstructure, hardness and the KIc. This is useful for increasing the performance of ceramics used for demanding applications particularly where it matters such as in military. Upon successful peening of bullet proof vests could result to higher ballistic strength and resistance against higher sonic velocity, which would not only prevent serious injuries, but could also help to save lives of soldiers on the battle fields.en
dc.language.isoenen
dc.publisherSPIE (International Society for Optics and Photonics)en
dc.relation.urlhttp://spie.org/Publications/Proceedings/Paper/10.1117/12.2182435?origin_id=x4325&start_volume_number=9600en
dc.subjectLaser peeningen
dc.subjectsilicon carbideen
dc.subjectadvanced ceramicen
dc.subjectsurface engineeringen
dc.titleDevelopment in laser peening of advanced ceramicen
dc.typeArticleen
dc.contributor.departmentUniversity of Chester Laser Engineering & Manufacturing Research Group (Shukla, Waugh, Lawrence); University of Chester Department of Natural Sciences (Smith)en
dc.identifier.journalProceedings of SPIEen
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