High temperature oxidation mechanism of a 3%Ni cast stainless steel

Vardavoulias, M; Papadimitriou, G; Fourlaris, G

dc.contributor.author	Vardavoulias, M	en
dc.contributor.author	Papadimitriou, G	en
dc.contributor.author	Fourlaris, G	en
dc.date.accessioned	2014-03-01T01:53:58Z
dc.date.available	2014-03-01T01:53:58Z
dc.date.issued	2004	en
dc.identifier.issn	1478-422X	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/27154
dc.subject	oxidation	en
dc.subject	cast duplex stainless steel	en
dc.subject	SEM	en
dc.subject	EDS microanalysis	en
dc.subject	microstructure	en
dc.subject.classification	Materials Science, Multidisciplinary	en
dc.subject.classification	Metallurgy & Metallurgical Engineering	en
dc.subject.other	FRACTURE-BEHAVIOR	en
dc.subject.other	CARBON	en
dc.subject.other	NI	en
dc.title	High temperature oxidation mechanism of a 3%Ni cast stainless steel	en
heal.type	journalArticle	en
heal.language	English	en
heal.publicationDate	2004	en
heal.abstract	In this work, the high temperature oxidation mechanism of a high chromium (28 wt-%) cast stainless steel containing 3%Ni, and with an austenitic-ferritic microstructure, has been studied and compared to that of a ferritic stainless steel with similar chromium and carbon contents but without any nickel additions. Two different oxidation temperatures (800 and 970degreesC) were selected for both the as cast and annealed (600degreesC for 2200 h) conditions. The oxidation mechanism of the Ni-containing duplex alloy has been found to involve the formation of four successive layers: (i) the external scale exhibiting the crystalline structure of Cr2O3 (ii) a single phase metal layer in contact with the oxide and consisting of austenite (iii) a decarburised zone exhibiting a two phase structure of ferrite and austenite (iv) the initial alloy microstructure consisting of ferrite, austenite and alloy carbides. The oxidation resistance of the austenitic-ferritic alloy is in all cases 50-100% higher than that of the ferritic alloy, while that of the annealed samples (all other experimental conditions remaining constant) is ten times higher than that of the as cast samples.	en
heal.publisher	MANEY PUBLISHING	en
heal.journalName	CORROSION ENGINEERING SCIENCE AND TECHNOLOGY	en
dc.identifier.isi	ISI:000227330900010	en
dc.identifier.volume	39	en
dc.identifier.issue	4	en
dc.identifier.spage	287	en
dc.identifier.epage	294	en