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2018 | OriginalPaper | Buchkapitel

3. The Precipitation of Silicide Particles in Heat-Resistant Titanium Alloys

verfasst von : Artemiy Popov, M. A. Zhilyakova, O. Elkina, K. I. Lugovaya

Erschienen in: Advanced Methods and Technologies in Metallurgy in Russia

Verlag: Springer International Publishing

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Abstract

The paper is devoted to the studying of silicide particle precipitation in the near-α- and two-phase (α + β) titanium alloys. It is shown that in Ti-Al-Si-Zr alloys, three different types of particles are precipitated: (Ti, Zr)5Si3 (S1), (Ti, Zr)6Si3 (S2), and (Ti, Zr)2Si (S3). The types of precipitated particles depend on the heat treatment modes and an alloying element ratio. The investigation of silicide particle influence on the mechanical properties of the alloys has shown that silicides S1 reduced viscosity characteristics, while silicides S2 and S3 were found to reduce the heat resistance due to the depletion of solid solution by Al and Si and to impede the formation of α2-phase particles. Microstructural characterization has been performed using optical microscopy, scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The orientation relationships between silicides and matrix phase were identified by electron diffraction.

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Titel: The Precipitation of Silicide Particles in Heat-Resistant Titanium Alloys
verfasst von: Artemiy Popov
M. A. Zhilyakova
O. Elkina
K. I. Lugovaya
Verlag: Springer International Publishing
Buch: Advanced Methods and Technologies in Metallurgy in Russia
Print ISBN: 978-3-319-66353-1

Electronic ISBN: 978-3-319-66354-8

Copyright-Jahr: 2018
DOI: https://doi.org/10.1007/978-3-319-66354-8_3

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