Modifications of surface properties of beta Ti by laser gas diffusion nitriding

Hdl Handle:
http://hdl.handle.net/10034/605459
Title:
Modifications of surface properties of beta Ti by laser gas diffusion nitriding
Authors:
Ng, Chi-Ho; Chan, Chi-Wai; Man, Hau-Chung; Waugh, David G.; Lawrence, Jonathan
Abstract:
b-type Ti-alloy is a promising biomedical implant material as it has a low Young’s modulus and is also known to have inferior surface hardness. Various surface treatments can be applied to enhance the surface hardness. Physical vapor deposition and chemical vapor deposition are two examples of this but these techniques have limitations such as poor interfacial adhesion and high distortion. Laser surface treatment is a relatively new surface modification method to enhance the surface hardness but its application is still not accepted by the industry. The major problem of this process involves surface melting which results in higher surface roughness after the laser surface treatment.This paper will report the results achieved by a 100W CW fiber laser for laser surface treatment without the surface being melted. Laser processing parameters were carefully selected so that the surface could be treated without surface melting and thus the surface finish of the component could be maintained. The surface and microstructural characteristics of the treated samples were examined using x-ray diffractometry, optical microscopy, three-dimensional surface profile and contact angle measurements, and nanoindentation test.
Affiliation:
University of Chester; Queen's University; The Hong Kong Polytechnic University
Citation:
g, C.-H., Chan, C.-W., Man, H.-C., Waugh, D., & Lawrence, J. (2016). Modifications of surface properties of beta Ti by laser gas diffusion nitriding. Journal of Laser Applications, 28(2), 022505. doi: doi:http://dx.doi.org/10.2351/1.4944000
Publisher:
AIP Publishing
Journal:
Journal of Laser Applications
Publication Date:
Mar-2016
URI:
http://hdl.handle.net/10034/605459
DOI:
10.2351/1.4944000
Additional Links:
http://scitation.aip.org/content/lia/journal/jla
Type:
Article
Language:
en
EISSN:
1938-1387
Sponsors:
The work described in this paper was supported by research grants (G-YK36 and G-YM75) from the Hong Kong Polytechnic University, Hong Kong Special Administration Region, China. The Ph.D. studentship of Chi-Ho Ng was supported by the University of Chester, UK.
Appears in Collections:
Mechanical Engineering

Full metadata record

DC FieldValue Language
dc.contributor.authorNg, Chi-Hoen
dc.contributor.authorChan, Chi-Waien
dc.contributor.authorMan, Hau-Chungen
dc.contributor.authorWaugh, David G.en
dc.contributor.authorLawrence, Jonathanen
dc.date.accessioned2016-04-15T12:44:17Zen
dc.date.available2016-04-15T12:44:17Zen
dc.date.issued2016-03en
dc.identifier.citationg, C.-H., Chan, C.-W., Man, H.-C., Waugh, D., & Lawrence, J. (2016). Modifications of surface properties of beta Ti by laser gas diffusion nitriding. Journal of Laser Applications, 28(2), 022505. doi: doi:http://dx.doi.org/10.2351/1.4944000en
dc.identifier.doi10.2351/1.4944000en
dc.identifier.urihttp://hdl.handle.net/10034/605459en
dc.description.abstractb-type Ti-alloy is a promising biomedical implant material as it has a low Young’s modulus and is also known to have inferior surface hardness. Various surface treatments can be applied to enhance the surface hardness. Physical vapor deposition and chemical vapor deposition are two examples of this but these techniques have limitations such as poor interfacial adhesion and high distortion. Laser surface treatment is a relatively new surface modification method to enhance the surface hardness but its application is still not accepted by the industry. The major problem of this process involves surface melting which results in higher surface roughness after the laser surface treatment.This paper will report the results achieved by a 100W CW fiber laser for laser surface treatment without the surface being melted. Laser processing parameters were carefully selected so that the surface could be treated without surface melting and thus the surface finish of the component could be maintained. The surface and microstructural characteristics of the treated samples were examined using x-ray diffractometry, optical microscopy, three-dimensional surface profile and contact angle measurements, and nanoindentation test.en
dc.description.sponsorshipThe work described in this paper was supported by research grants (G-YK36 and G-YM75) from the Hong Kong Polytechnic University, Hong Kong Special Administration Region, China. The Ph.D. studentship of Chi-Ho Ng was supported by the University of Chester, UK.en
dc.language.isoenen
dc.publisherAIP Publishingen
dc.relation.urlhttp://scitation.aip.org/content/lia/journal/jlaen
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/en
dc.subjectBeta Tien
dc.subjectLaser surface treatmenten
dc.subjectDiffusion nitridingen
dc.subjectSurface meltingen
dc.subjectFiber laseren
dc.subjectContact angleen
dc.subjectWettabilityen
dc.subjectMicrostructureen
dc.titleModifications of surface properties of beta Ti by laser gas diffusion nitridingen
dc.typeArticleen
dc.identifier.eissn1938-1387en
dc.contributor.departmentUniversity of Chester; Queen's University; The Hong Kong Polytechnic Universityen
dc.identifier.journalJournal of Laser Applicationsen
dc.date.accepted2016-03en
or.grant.openaccessYesen
rioxxterms.funderxxen
rioxxterms.identifier.projectxxen
rioxxterms.versionAMen
rioxxterms.licenseref.startdate2216-04-15en
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