Structure, properties and phase transformations in feedstock Ti2AlNb powder used for additive manufacturing

A.G. Illarionov, S.L. Demakov, M.S. Karabanalov, M.A. Shabanov, A.A. Popov, E.O. Smirnova, S.I. Stepanov показать трудоустройства и электронную почту
Получена 27 ноября 2023; Принята 01 февраля 2024;
Эта работа написана на английском языке
Цитирование: A.G. Illarionov, S.L. Demakov, M.S. Karabanalov, M.A. Shabanov, A.A. Popov, E.O. Smirnova, S.I. Stepanov. Structure, properties and phase transformations in feedstock Ti2AlNb powder used for additive manufacturing. Письма о материалах. 2024. Т.14. №1. С.66-71
BibTex   https://doi.org/10.48612/letters/2024-1-66-71

Аннотация

The powder morphology, phase composition and microstructure were thoroughly investigated. The temperature ranges of phase transformations in the powder during heating and cooling have been establishedElectrode induction gas atomization (EIGA) is a perspective, cost-effective method for producing spherical intermetallic titanium powders used in additive manufacturing. This study investigates the morphology, microstructure, nanoindentation properties, chemical and phase composition of commercial pre-alloyed EIGA powder of the Ti2AlNb-based alloy. The effect of particle size distribution on flowability is studied. Ti-23Al-25Nb powder is characterized by a typical dendritic single β-phase microstructure with almost homogeneous distribution of alloying elements. The dendritiс body is slightly enriched with Nb and the dendritic boundaries are enriched with Al. The temperature ranges of phase transformations are studied using differential scanning calorimetry at a rate of 50° / min. Several phase transformations including β → ω0; β → O; O → β+α2; α2 → β are revealed during heating. The activation of the powder oxidation process at temperatures above 700°C is observed.

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Финансирование на английском языке

1. Russian Science Support Foundation (Russia) - № 22–49-02066
2. Department of Science and Technology, Ministry of Science and Technology, India - № 22–49-02066