Zr bearing gamma-TiAl induction melted

• Tipo: Artigo em Revista Científica Internacional
• Data: 2000

Autores

J. Barbosa (Autor) Outra; A. Duarte (Autor) Outra; Carlos Silva Ribeiro (Autor) FEUP; Filomena Viana (Autor) FEUP; C. Monteiro (Autor) Outra

Revista

Título: Key Engineering Materials

Vol. 188

Páginas: 45-54

ISSN: 1013-9826

Editora: Trans Tech Publications Ltd

Indexação

ISI Web of Knowledge - 4 Citações

Scopus - 5 Citações

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Engenharia dos materiais

Outras Informações

ID Authenticus: P-001-1CC

DOI: 10.4028/www.scientific.net/KEM.188.45

Abstract (EN): 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 gamma -phase and increases the volume fraction of this constituent, showing the gamma stabiliser role of zirconium.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 10