Utilize este identificador para referenciar este registo: http://hdl.handle.net/1822/12448

TítuloZr bearing gama-TiAl induction melted
Autor(es)Barbosa, J.
Duarte, António
Ribeiro, Carlos Silva
Viana, Filomena
Monteiro, A. Caetano
Palavras-chaveTiAl
Melting
Crucible
Heat treatment
heat treating
induction melting
Data2000
EditoraTrans Tech Publications Ltd
RevistaKey Engineering Materials
Citação"Key Engineering Materials". ISSN 1662-9795. 188 (2000) 45-54.
Resumo(s)This paper describes the processing results of TiAl alloys melted under argon atmosphere by induction melting, using crucibles made of calcia and stabilized zirconia. Castings were allowed to solidify inside the crucible, in order to simulate the worst situation using this processing. Segregation profiles of residual elements and microhardness of different phases were evaluated, as well as its relation with the “alpha-case” extension. Two TiAl alloys, with 1 at. % zirconium and zirconium free, were produced and heat treated aiming to replace their as-cast structure by a quasi-lamellar one. The respective zirconium partition amongst microconstituents was evaluated, being demonstrated that zirconium concentrates in the g-phase and increases the volume fraction of this constituent, showing the g stabiliser role of zirconium.
Tipoarticle
URIhttp://hdl.handle.net/1822/12448
ISBN*************
ISSN1662-9795
Arbitragem científicayes
AcessoopenAccess
Aparece nas coleções:DEM - Artigos em revistas de circulação internacional com arbitragem científica

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