The production of TiAl by foundry processes

• Autor(es): Barbosa, J. ; Ribeiro, Carlos Silva ; Monteiro, A. Caetano
• Data: 2002
• Identificador Persistente: http://hdl.handle.net/1822/12446
• Origem: RepositóriUM - Universidade do Minho
• Assunto(s): TiAl; Melting; Crucible
• Tipo de Documento: Artigo
• Idioma: Inglês

Descrição

This paper describes a foundry technique that enables the production of TiAl employing an adapted melting procedure that uses an induction furnace with suitable refractory crucibles, inside a controlled atmosphere chamber. The developed technique allows the production of samples with a low and controlled amount of residual elements, with a thin superficial hard skin – known as “alpha-case” – and allows the use of higher superheating temperatures, when compared with alternative melting procedures. The micro-hardness and the residual contamination profiles, from the outside to the interior of samples, are presented and correlated to crucible refractory material and foundry practice.