Excimer laser surface treatment of a spheroidal graphite cast iron: possible application for running-in parts of automotive motors

Pantelis, D; Tissandier, A; Manousaki, A; Hontzopoulos, E

dc.contributor.author	Pantelis, D	en
dc.contributor.author	Tissandier, A	en
dc.contributor.author	Manousaki, A	en
dc.contributor.author	Hontzopoulos, E	en
dc.date.accessioned	2014-03-01T01:09:52Z
dc.date.available	2014-03-01T01:09:52Z
dc.date.issued	1994	en
dc.identifier.issn	0257-8972	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/11226
dc.subject	Cast Iron	en
dc.subject	Excimer Laser	en
dc.subject	Surface Treatment	en
dc.subject.classification	Materials Science, Coatings & Films	en
dc.subject.classification	Physics, Applied	en
dc.title	Excimer laser surface treatment of a spheroidal graphite cast iron: possible application for running-in parts of automotive motors	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/S0257-8972(05)80029-5	en
heal.identifier.secondary	http://dx.doi.org/10.1016/S0257-8972(05)80029-5	en
heal.language	English	en
heal.publicationDate	1994	en
heal.abstract	After the final machining on spheroidal graphite cast iron, a thin layer of the matrix material covers the graphite spherulites. This layer has been selectively removed from the graphite nodules using a KrF excimer laser. The plasma created on the surface generates shock waves, which harden the bulk material to a depth of nearly 10 μm and which by reflecting on the spherulites, pushing away the molten metal, form craters. The molten layer resulting from the treatment has an extremely fine microstructure and is harder than the matrix, with a roughness slightly higher than that of the initial surface. Preliminary wear tests show that the friction coefficient appears to be lower than that of the untreated material, because of the improvement in surface properties and because of the opened spherulites which are acting like oil reservoirs. A mathematical model is presented in order to calculate the roughness of the treated surfaces. It is in rather good accordance with experimental measurements, taking into account the laser processing parameters. © 1994 Elsevier Science S.A. All rights reserved.	en
heal.publisher	ELSEVIER SCIENCE SA LAUSANNE	en
heal.journalName	Surface and Coatings Technology	en
dc.identifier.doi	10.1016/S0257-8972(05)80029-5	en
dc.identifier.isi	ISI:A1994PF31600010	en
dc.identifier.volume	67	en
dc.identifier.issue	1-2	en
dc.identifier.spage	69	en
dc.identifier.epage	77	en