Beta-Phase Decomposition Sequence during Continuous Cooling of High-Temperature Titanium Alloy

D.V. Gadeev; Sergey Demakov; Fedor V. Vodolazskiy

doi:10.4028/www.scientific.net/SSP.265.575

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HomeSolid State PhenomenaSolid State Phenomena Vol. 265Beta-Phase Decomposition Sequence during...

Beta-Phase Decomposition Sequence during Continuous Cooling of High-Temperature Titanium Alloy

Abstract:

The diagrams of continuous cooling transformation (CCT) of β-phase decomposition for hot-rolled VT8M titanium alloy were obtained using the differential thermal analysis, scanning electron microscopy, and X-Ray diffraction (XRD) analysis for heating temperatures from 880 to 960 °C. The decomposition process was found to occur with several distinguishable stages. The transformation begins from high-temperature stage of the growing of primary alpha precipitates. At lower temperatures, it is followed by the medium-temperature stage accompanied by precipitation of grain-boundary alpha and the formation of coarse secondary alpha-lamellae. The low-temperature stage has been established to be characterized by the formation of dispersed alpha-platelets within beta-grains.

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Periodical:

Solid State Phenomena (Volume 265)

Pages:

575-579

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.265.575

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Online since:

September 2017

Authors:

D.V. Gadeev*, Sergey Demakov, Fedor V. Vodolazskiy

Keywords:

Beta-Phase Decomposition, Continuous Cooling Transformation, DTA, Microhardness, Precipitation Sequence, Primary Alpha, Secondary Alpha, VT8M, XRD

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References

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DOI: 10.1007/bf02667680

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