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Physics of Metals and Metallography
Erschienen in: Physics of Metals and Metallography 8/2018

01.08.2018 | STRUCTURE, PHASE TRANSFORMATIONS, AND DIFFUSION

Formation of the Structure and Properties upon the Aging of a Quenched Alloy Based on Orthorhombic Titanium Aluminide Ti2AlNb Alloyed with Hydrogen

verfasst von: A. G. Illarionov, O. G. Khadzhieva, O. A. Elkina

Erschienen in: Physics of Metals and Metallography | Ausgabe 8/2018

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Abstract

Transmission electron microscopy and microindentation have been used to study the changes in the structure, phase composition, microhardness, and elastic modulus of the Ti–24.3Al–24.8Nb–1.0Zr–1.4V–0.6Mo–0.3Si (at %) alloy based on the orthorhombic titanium aluminide Ti2AlNb alloyed with hydrogen to 8.5 at % upon aging in the temperature range of 600–700°C after quenching from 900°C. It has been detected that the alloying with hydrogen leads to a change in the morphology of precipitated orthorhombic (O) plates upon aging from a zigzag-shaped to packet morphology and at the aging temperature of 700˚С initiates the transformation of the substructure of the O plates into a polydomain one with the formation of the so-called “polysynthetic twin.” The relationship between the structural characteristics, the amounts of the arising phases, and the values of the microhardness and elastic modulus of the investigated alloys with and without hydrogen after quenching and aging has been established.
Vorheriger Artikel Effect of Homogenization on Microstructure and Properties of Al–Mg–Si Roll-Casting Sheet
Nächster Artikel Mechanisms of Cold Deformation under High Pressure of Superconductive MgB2 Ceramics

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Metadaten
Titel
Formation of the Structure and Properties upon the Aging of a Quenched Alloy Based on Orthorhombic Titanium Aluminide Ti2AlNb Alloyed with Hydrogen
verfasst von
A. G. Illarionov
O. G. Khadzhieva
O. A. Elkina
Publikationsdatum
01.08.2018
Verlag
Pleiades Publishing
Erschienen in
Physics of Metals and Metallography / Ausgabe 8/2018
Print ISSN: 0031-918X
Elektronische ISSN: 1555-6190
DOI
https://doi.org/10.1134/S0031918X18040051

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