Metastable Microstructures in Rapidly Solidified Ni Rich TiNi Alloys

Metastable Microstructures in Rapidly Solidified Ni Rich TiNi Alloys

The metastable microstructures in two rapidly solidified Ni rich Ti–Ni alloys are studied. A first report of the presence of a cubic phase with three times the lattice parameter of B2-TiNi in melt spun Ti40Ni60 alloy is presented. This phase has precipitated from the massively solidified B2-TiNi. We...

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Veröffentlicht in:Materials Transactions, JIM JIM, 1997, Vol.38(5), pp.406-412
Hauptverfasser: Nagarajan, R., Ranganathan, S., Aoki, K., Chattopadhyay, K.
Format: Artikel
Sprache:eng
Schlagworte:
Applied sciences
electron/atom ratio
Exact sciences and technology
faulted structure
Foundry engineering
glass
massive solidification
Metals. Metallurgy
Other casting methods. Solidification
precipitation
Production techniques
T0 curve
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Zusammenfassung:The metastable microstructures in two rapidly solidified Ni rich Ti–Ni alloys are studied. A first report of the presence of a cubic phase with three times the lattice parameter of B2-TiNi in melt spun Ti40Ni60 alloy is presented. This phase has precipitated from the massively solidified B2-TiNi. We also report the formation of a faulted structure (A9), polytypic to TiNi3 along with TiNi3 in melt spun Ti30Ni70 alloy. It is argued that this structure is stabilised due to a specific valence electron by atom ratio.
ISSN:0916-1821
2432-471X
DOI:10.2320/matertrans1989.38.406