Microstructural characterisation of Al-Hf and Al-Li-Hf spray deposits

Antipas, GSE; Lekakou, C; Tsakiropoulos, P

dc.contributor.author	Antipas, GSE	en
dc.contributor.author	Lekakou, C	en
dc.contributor.author	Tsakiropoulos, P	en
dc.date.accessioned	2014-03-01T02:05:25Z
dc.date.available	2014-03-01T02:05:25Z
dc.date.issued	2011	en
dc.identifier.issn	1044-5803	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/29476
dc.subject	Gas atomization	en
dc.subject	Spray forming	en
dc.subject	Al-Li alloys	en
dc.subject	Alpha phase precipitate	en
dc.subject	Delta phase precipitate	en
dc.subject	Particle size	en
dc.subject	Grain size	en
dc.subject	Scanning electron microscopy	en
dc.subject.classification	Materials Science, Characterization & Testing	en
dc.subject.other	ALLOYS	en
dc.title	Microstructural characterisation of Al-Hf and Al-Li-Hf spray deposits	en
heal.type	journalArticle	en
heal.language	English	en
heal.publicationDate	2011	en
heal.abstract	Microscopic examination of an Al-1.6 wt.%Hf and an Al-3.2 wt.%Li-1.6 wt.%Hf spray formed alloys revealed high density near the center axis with high porosity present at the edges of the spray deposits. Spherical particles with an apparent diameter of up to 140 mu m were found near the center axis of the spray while larger particles were deformed upon impact on the substrate. The particle (drop) size as well as the grain size was found to decrease with distance from the center of the preforms. The intermetallic phases observed in the center of both deposits were filamentary L1(2)-Al3Hf for the Al-Hf alloy and spherical/filamentary L1(2)-Al-3(Li,Hf) for the Al-Li-Hf alloy. (C) 2011 Elsevier Inc. All rights reserved.	en
heal.publisher	ELSEVIER SCIENCE INC	en
heal.journalName	MATERIALS CHARACTERIZATION	en
dc.identifier.isi	ISI:000290510200007	en
dc.identifier.volume	62	en
dc.identifier.issue	4	en
dc.identifier.spage	402	en
dc.identifier.epage	408	en