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Stability of the ordered orthorhombic phase in Ti-24Al-11NbThe ordered orthorhombic 'O' phase in the Ti-Al-Nb ordered alloy system emerges either through slow cooling from above 1200 C or through isothermal aging after quenching from that temperature regime. An experimental investigation is presently conducted of the structural relationship between the O and alpha(2) phases, in order to clarify the mechanism of transition between the two. The transition occurs with the formation of a platelike alpha(2) phase within the O matrix, and may be characterized as due to a shape-deformation mechanism associated with diffusion of excess Nb away from the O/alpha(2) interface.
Document ID
19920069540
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
doi:10.1016/0956-716X(92)90348-I
Authors
Hsiung, L. M. (NASA Headquarters Washington, DC United States)
Wadley, H. N. G. (Virginia, University Charlottesville, United States)
Date Acquired
August 15, 2013
Publication Date
September 1, 1992
Publication Information
Publication: Scripta Metallurgica et Materialia
Volume: 27
Issue: 5 Se
ISSN: 0956-716X
Subject Category
Metallic Materials
Accession Number
92A52164
Funding Number(s)
CONTRACT_GRANT: NAGW-1692
Distribution Limits
Public
Copyright
Other

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