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Published in: Metallurgist 3-4/2022

09-08-2022

Effects of an Ingot Smelting Method and Pressure Treatment Modes on the Structure of Deformed TiNi-Based Alloy Semi-Finished Products

Authors: M. Yu. Kollerov, D. E. Gusev, A. A. Sharonov, A. V. Alexandrov, M. B. Afonina

Published in: Metallurgist | Issue 3-4/2022

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Abstract

It is shown that the pressure treatment of titanium nickelide alloys should be carried out in two stages. At the first stage, ingots are deformed in order to transform the brittle cast structure, while at the second stage, the necessary shape is imparted to a semi-finished product along with the required structure and material properties. The deformability of TiNi alloy ingots largely depends on the content of impurities and the uniformity of a chemical composition, which is determined by the purity of a charge material and the smelting method. The deformability can be increased on the basis of using a titanium sponge in terms of a charge and smelting ingots either by an induction method in a cold crucible unit or by the combination of skull melting with subsequent vacuum-arc remelting. At the second pressure treatment stage during the acquisition of deformed semi-finished products with the required structure and shape memory effect properties, it is necessary to consider temperature-time conditions for the development of polygonization and recrystallization processes, as well as the precipitation of Ni-rich Ti3Ni4 intermetallics.

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Metadata
Title
Effects of an Ingot Smelting Method and Pressure Treatment Modes on the Structure of Deformed TiNi-Based Alloy Semi-Finished Products
Authors
M. Yu. Kollerov
D. E. Gusev
A. A. Sharonov
A. V. Alexandrov
M. B. Afonina
Publication date
09-08-2022
Publisher
Springer US
Published in
Metallurgist / Issue 3-4/2022
Print ISSN: 0026-0894
Electronic ISSN: 1573-8892
DOI
https://doi.org/10.1007/s11015-022-01344-9

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