Embrittlement of an Orthorhombic Ti2AlNb-Based Titanium Alloy in a Hydrogenated State

A rapidly quenched intermetallic VTI-4 titanium alloy, which is based on the orthorhombic Ti 2 AlNb phase and is formed by extraction from a molten hanging drop, has been hydrogenated. The phase composition and the microhardness of the alloy saturated to various hydrogen contents are studied. To stu...

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Bibliographic Details
Published in:Russian metallurgy Metally 2019, Vol.2019 (1), p.31-35
Main Authors: Senkevich, K. S., Umarova, O. Z., Zasypkin, V. V.
Format: Article
Language:English
Subjects:
Alloy powders
Ball milling
Chemistry and Materials Science
Hydrogen embrittlement
Hydrogen storage
Hydrogenation
Intermetallic compounds
Materials Science
Metallic Materials
Microhardness
Phase composition
Rapid quenching (metallurgy)
Titanium alloys
Titanium base alloys
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Summary:A rapidly quenched intermetallic VTI-4 titanium alloy, which is based on the orthorhombic Ti 2 AlNb phase and is formed by extraction from a molten hanging drop, has been hydrogenated. The phase composition and the microhardness of the alloy saturated to various hydrogen contents are studied. To study the opportunities of producing a fine alloy powder, fibers are ground in a ball mill. The alloy in the rapidly quenched β single-phase state is found to exhibit a high plasticity and is not fragmented upon ball milling, and sharp fiber embrittlement is observed as the alloy is saturated to a high hydrogen content (0.88 wt %). In this hydrogenated state, the alloy has a high hardness and its phase composition consists of the hydrogen-rich Ti 2 AlNb phase.
ISSN:0036-0295
1555-6255
1531-8648
DOI:10.1134/S0036029519010130