Evolution of Twin-Related Variants of α Phase in a Ti-V-Cu Alloy

Hoi Pang Ng; Colleen J. Bettles; Barry C. Muddle

doi:10.4028/www.scientific.net/SSP.172-174.481

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HomeSolid State PhenomenaSolid State Phenomena Vols. 172-174Evolution of Twin-Related Variants of α Phase in a...

Evolution of Twin-Related Variants of α Phase in a Ti-V-Cu Alloy

Abstract:

The precipitation of a-phase has been investigated in a concentrated b-alloy of the Ti-V-Cu system. a-precipitates in geometrically coupled forms were developed in the alloy when subject to isothermal ageing at 500°C. High-resolution transmission electron microscopy (HRTEM) revealed that a-phase embryos tend to nucleate in a symmetrical manner directly from an early-stage solute-partitioned diffusional product. The a-precipitates so developed constitute twin-related variants characterized by a twin plane lying on one of the {0111}_a planes. The results are discussed with respect to the role of Cu on the formation of heterogeneous nucleation sites for a-phase.

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Solid State Phenomena (Volumes 172-174)

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481-486

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https://doi.org/10.4028/www.scientific.net/SSP.172-174.481

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June 2011

Authors:

Hoi Pang Ng, Colleen J. Bettles, Barry C. Muddle

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Aging, Precipitation, TEM, Titanium Alloy

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