Entrained oxide films in TiAl castings

Jiawei Mi; Richard Harding; Michael Wickins; John Campbell

doi:10.1016/S0966-9795(03)00006-2

Entrained oxide films in TiAl castings

Jiawei Mi, Richard Harding, Michael Wickins, John Campbell

Metallurgy and Materials

Research output: Contribution to journal › Article

35 Citations (Scopus)

Abstract

Tilt pouring of TiAl alloy from an induction skull melting (ISM) furnace into a ceramic shell mould has been carried out in this research. Microstructures and casting defects entrained by surface turbulence have been examined using scanning electron microscopy and EDX analysis. Oxide films were found draped over the dendrites of shrinkage porosity and the inner surface of bubbles in the experimental TiAl casting. The entrained oxide films act as heterogeneous nucleation sites, contributing to the formation of centre-line shrinkage porosity in the cast TiAl bars. (C) 2003 Elsevier Science Ltd. All rights reserved.

Original language	English
Pages (from-to)	377-385
Number of pages	9
Journal	Intermetallics
Volume	11
Issue number	4
DOIs	https://doi.org/10.1016/S0966-9795(03)00006-2
Publication status	Published - 1 Apr 2003

Keywords

casting
microstructure
titanium aluminides
defects
based on TiAl

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10.1016/S0966-9795(03)00006-2

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abstract = "Tilt pouring of TiAl alloy from an induction skull melting (ISM) furnace into a ceramic shell mould has been carried out in this research. Microstructures and casting defects entrained by surface turbulence have been examined using scanning electron microscopy and EDX analysis. Oxide films were found draped over the dendrites of shrinkage porosity and the inner surface of bubbles in the experimental TiAl casting. The entrained oxide films act as heterogeneous nucleation sites, contributing to the formation of centre-line shrinkage porosity in the cast TiAl bars. (C) 2003 Elsevier Science Ltd. All rights reserved.",

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AU - Wickins, Michael

AU - Campbell, John

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AB - Tilt pouring of TiAl alloy from an induction skull melting (ISM) furnace into a ceramic shell mould has been carried out in this research. Microstructures and casting defects entrained by surface turbulence have been examined using scanning electron microscopy and EDX analysis. Oxide films were found draped over the dendrites of shrinkage porosity and the inner surface of bubbles in the experimental TiAl casting. The entrained oxide films act as heterogeneous nucleation sites, contributing to the formation of centre-line shrinkage porosity in the cast TiAl bars. (C) 2003 Elsevier Science Ltd. All rights reserved.

KW - casting

KW - microstructure

KW - titanium aluminides

KW - defects

KW - based on TiAl

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EP - 385

JO - Intermetallics

JF - Intermetallics

IS - 4

ER -

Entrained oxide films in TiAl castings

Abstract

Keywords

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