Characterisation of laser modified WC-CoCr coatings

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dc.contributor	Universitat Politècnica de Catalunya. Departament de Ciència dels Materials i Enginyeria Metal·lúrgica
dc.contributor	Universitat Politècnica de Catalunya. CDAL - Centre de Disseny d'Aliatges Lleugers i Tractaments de Superfície
dc.contributor.author	Chikarakaraa, Evans
dc.contributor.author	Punset Fuste, Miquel
dc.contributor.author	Picas Barrachina, Josep Anton
dc.contributor.author	Brabazon, Dermot
dc.contributor.author	Naher, S.
dc.date	2011
dc.identifier.citation	Chikarakaraa, E. [et al.]. Characterisation of laser modified WC-CoCr coatings. A: ESAFORM Conference on Material Forming. "14th International ESAFORM Conference on Material Forming". Belfast: American Institute of Physics (AIP), 2011, p. 1087-1092.
dc.identifier.citation	978-0-7354-0911-8
dc.identifier.citation	10.1063/1.3589661
dc.identifier.uri	http://hdl.handle.net/2117/14082
dc.language.iso	eng
dc.publisher	American Institute of Physics (AIP)
dc.rights	info:eu-repo/semantics/openAccess
dc.subject	Àrees temàtiques de la UPC::Enginyeria dels materials::Metal·lúrgia
dc.subject	Tribology
dc.subject	CO2 laser surface modification
dc.subject	HVOF
dc.subject	Tribologia
dc.title	Characterisation of laser modified WC-CoCr coatings
dc.type	info:eu-repo/semantics/publishedVersion
dc.type	info:eu-repo/semantics/conferenceObject
dc.description.abstract	In this work the affects of laser characteristics on surface morphology, microstructure, microhardness and wear rates of high velocity oxygen fuel (HVOF) WC–CoCr coatings were investigated. Continuous and pulsed laser treatments were applied on the HVOF coatings using a CO2 laser of 10.6 μm wavelength. Continuous laser treatment significantly improved homogeneity of the coatings. Pulsed laser treatment produced significantly higher discontinuities compared to continuous mode. Microhardness increased by 45% for continuous mode laser modified WC-CoCr coatings. However, wear resistance deteriorated, with a notable 40% increase in wear rate. The variations in coating properties were attributed to the re-melting and rapid quenching of the CoCr bonding matrix allowing for WC redistribution.
dc.description.abstract	Peer Reviewed

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