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2020 №02 (06) DOI of Article
10.37434/sem2020.02.07
2020 №02 (08)

Electrometallurgy Today 2020 #02
SEM, 2020, #2, 39-43 pages

High-temperature mechanical properties of β-stabilized intermetallic alloy of TiAl system after induction zone melting

Authors
L.M. Lobanov, E.A. Asnis, N.V. Piskun, I.I. Statkevich
E.O. Paton Electric Welding Institute of the NAS of Ukraine. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: office@paton.kiev.ua

Abstract
Intermetallic β-stabilized alloy of TiAl−Ti–44Al–5Nb–3Cr–1.5Zr (at. %) system, which was obtained by electron beam melting was investigated. The cast alloy blanks were re-remelted by the method of induction crucibleless zone melting. This processing method is one of the most attractive for improving the structure of the ingot, which, in its turn, significantly improves the mechanical properties of the alloy. The paper describes the equipment for hightemperature mechanical testing of the alloy. Such mechanical characteristics as yield strength, tensile strength, degree of deformation during compression, as well as the modulus of elasticity and creep rate in the initial state and after ICZM were determined. Deformation curves were plotted from these data. The test results showed that ICZM led to a significant improvement of the high-temperature characteristics of Ti–44Al–5Nb–3Cr–1.5Zr alloy. Ref. 15, Tabl. 1, Fig. 5.
Keywords: intermetallic alloy; TiAl system; high-temperature mechanical tests; mechanical characteristics; strength; yield; degree of deformation; creep; elasticity

Received 04.06.2020

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