Oxygen Scavenging Effect of the alpha 2 Phase in the TiAl Intermetallic Compound

Oxygen Scavenging Effect of the alpha 2 Phase in the TiAl Intermetallic Compound

Atom probe field-ion microscopy was used to determine the oxygen distribution in a titanium aluminide, TiAl, alloy with a lamellar structure. It is shown that the alpha 2 phase is much more enriched in O than the gamma phase. This is in agreement with a proposal that the second phase, alpha 2, acts...

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Veröffentlicht in:Scripta metallurgica et materialia 1992-03, Vol.26 (6), p.969-976
Hauptverfasser: Uemori, R, Hanamura, T, Morikawa, H
Format: Artikel
Sprache:eng
Schlagworte:
360102 - Metals & Alloys- Structure & Phase Studies
ALLOYS
ALUMINIUM ALLOYS
CHEMICAL COMPOSITION
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CUBIC LATTICES
DUCTILITY
ELEMENTS
FCC LATTICES
HCP LATTICES
HEXAGONAL LATTICES
INTERMETALLIC COMPOUNDS
MATERIALS SCIENCE
MECHANICAL PROPERTIES
NONMETALS
OXYGEN
PHASE TRANSFORMATIONS
TENSILE PROPERTIES
TITANIUM ALLOYS
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Zusammenfassung:Atom probe field-ion microscopy was used to determine the oxygen distribution in a titanium aluminide, TiAl, alloy with a lamellar structure. It is shown that the alpha 2 phase is much more enriched in O than the gamma phase. This is in agreement with a proposal that the second phase, alpha 2, acts as an O scavenger, decreases the O content in the gamma phase and improves the ductility of the gamma phase.
ISSN:0956-716X
DOI:10.1016/0956-716X(92)90692-8