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

Hdl Handle:
http://hdl.handle.net/10034/610774
Title:
Modifications of surface properties of beta Ti by laser gas diffusion nitriding
Authors:
Ng, Chi-Ho; Lawrence, Jonathan; Waugh, David G.; Chan, Chi-Wai; Man, Hau-Chung
Abstract:
β -type Ti-alloy is a promising biomedical implant material as it has a low Young’s modulus but is also known to have inferior surface hardness. Various surface treatments can be applied to enhance the surface hardness. Physical vapour deposition (PVD) and chemical vapour deposition (CVD) 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 100 W 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 (XRD), optical microscopy (OM), 3-D surface profile & contact angle measurements and nano-indentation test.
Affiliation:
University of Chester
Citation:
Ng, C-H., Lawrence J., Waugh D.G., Chan C-W., Man H.C. (2015). Modifications of surface properties of beta Ti by laser gas diffusion nitriding. The 34th International Congress on Applications of Lasers and Electro-Optics (ICALEO 2015), 18-22 October 2015, Atlanta, GA., USA.
Publisher:
Laser Institute of America
Publication Date:
Oct-2015
URI:
http://hdl.handle.net/10034/610774
Additional Links:
http://icaleo2015.conferencespot.org/
Type:
Meetings and Proceedings
Language:
en
ISBN:
978-1-940168-05-0
Appears in Collections:
Mechanical Engineering

Full metadata record

DC FieldValue Language
dc.contributor.authorNg, Chi-Hoen
dc.contributor.authorLawrence, Jonathanen
dc.contributor.authorWaugh, David G.en
dc.contributor.authorChan, Chi-Waien
dc.contributor.authorMan, Hau-Chungen
dc.date.accessioned2016-05-25T17:43:33Zen
dc.date.available2016-05-25T17:43:33Zen
dc.date.issued2015-10en
dc.identifier.citationNg, C-H., Lawrence J., Waugh D.G., Chan C-W., Man H.C. (2015). Modifications of surface properties of beta Ti by laser gas diffusion nitriding. The 34th International Congress on Applications of Lasers and Electro-Optics (ICALEO 2015), 18-22 October 2015, Atlanta, GA., USA.en
dc.identifier.isbn978-1-940168-05-0en
dc.identifier.urihttp://hdl.handle.net/10034/610774en
dc.description.abstractβ -type Ti-alloy is a promising biomedical implant material as it has a low Young’s modulus but is also known to have inferior surface hardness. Various surface treatments can be applied to enhance the surface hardness. Physical vapour deposition (PVD) and chemical vapour deposition (CVD) 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 100 W 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 (XRD), optical microscopy (OM), 3-D surface profile & contact angle measurements and nano-indentation test.en
dc.language.isoenen
dc.publisherLaser Institute of Americaen
dc.relation.urlhttp://icaleo2015.conferencespot.org/en
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectlaser surface treatmenten
dc.subjectBeta Tien
dc.subjectsurface propertiesen
dc.subjectcontact angleen
dc.subjectWettabilityen
dc.subjectwettability characteristicsen
dc.titleModifications of surface properties of beta Ti by laser gas diffusion nitridingen
dc.typeMeetings and Proceedingsen
dc.contributor.departmentUniversity of Chesteren
dc.date.accepted2015-05en
or.grant.openaccessYesen
rioxxterms.funderxen
rioxxterms.identifier.projectxen
rioxxterms.versionAMen
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