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Femtosecond-laser sharp shaping of millimeter-scale geometries with vertical sidewalls

hal.structure.identifierDepartment of Electrical and Computer Engineering
dc.contributor.authorZHU, Qiuchi
hal.structure.identifierDepartment of Electrical and Computer Engineering
dc.contributor.authorFAN, Peixun
hal.structure.identifierDepartment of Electrical and Computer Engineering
dc.contributor.authorLI, Nan
hal.structure.identifierDepartment of Electrical and Computer Engineering
dc.contributor.authorCARLSON, Timothy
hal.structure.identifierDepartment of Mechanical and Materials Engineering
dc.contributor.authorCUI, Bai
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorSILVAIN, Jean-François
hal.structure.identifierDepartment of Electrical and Computer Engineering
dc.contributor.authorHUDGINS, Jerry
hal.structure.identifierDepartment of Electrical and Computer Engineering
dc.contributor.authorLU, Yong
dc.date.issued2021-11-18
dc.identifier.issn2631-7990
dc.description.abstractEnAs femtosecond (fs) laser machining advances from micro/nanoscale to macroscale, approaches capable of machining macroscale geometries that sustain micro/nanoscale precisions are in great demand. In this research, an fs laser sharp shaping approach was developed to address two key challenges in macroscale machining (i.e. defects on edges and tapered sidewalls). The evolution of edge sharpness (edge transition width) and sidewall tapers were systematically investigated through which the dilemma of simultaneously achieving sharp edges and vertical sidewalls were addressed. Through decreasing the angle of incidence (AOI) from 0 • to −5 • , the edge transition width could be reduced to below 10 µm but at the cost of increased sidewall tapers. Furthermore, by analyzing lateral and vertical ablation behaviors, a parameter-compensation strategy was developed by gradually decreasing the scanning diameters along depth and using optimal laser powers to produce non-tapered sidewalls. The fs laser ablation behaviors were precisely controlled and coordinated to optimize the parameter compensations in general manufacturing applications. The AOI control together with the parameter compensation provides a versatile solution to simultaneously achieve vertical sidewalls as well as sharp edges of entrances and exits for geometries of different shapes and dimensions. Both mm-scale diameters and depths were realized with dimensional precisions below 10 µm and surface roughness below 1 µm. This research establishes a novel strategy to finely control the fs laser machining process, enabling the fs laser applications in macroscale machining with micro/nanoscale precisions.
dc.language.isoen
dc.publisherIOP Science
dc.subject.enfemtosecond laser
dc.subject.enextreme manufacturing
dc.subject.enmillimeter-scale machining
dc.subject.enzero-taper drilling
dc.subject.enedge quality control
dc.title.enFemtosecond-laser sharp shaping of millimeter-scale geometries with vertical sidewalls
dc.typeArticle de revue
dc.identifier.doi10.1088/2631-7990/ac2961
dc.subject.halChimie/Matériaux
bordeaux.journalInternational Journal of Extreme Manufacturing
bordeaux.page045001 (12 p.)
bordeaux.volume3
bordeaux.issue4
bordeaux.peerReviewedoui
hal.identifierhal-03441532
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-03441532v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=International%20Journal%20of%20Extreme%20Manufacturing&rft.date=2021-11-18&rft.volume=3&rft.issue=4&rft.spage=045001%20(12%20p.)&rft.epage=045001%20(12%20p.)&rft.eissn=2631-7990&rft.issn=2631-7990&rft.au=ZHU,%20Qiuchi&FAN,%20Peixun&LI,%20Nan&CARLSON,%20Timothy&CUI,%20Bai&rft.genre=article


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