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Effect of Heat Treatment on the Structure and Mechanical Properties of the Solid-Phase VT6 Alloy Welded Joint with an Ultrafine-Grained VT22 Alloy Interlayer

Abstract

The structure and mechanical properties of the titanium alloy VT6 joint diffusion welded in vacuum at 820°C using an ultrafine-grained interlayer made of alloy VT22 in are studied after annealing at 900°C for 2 h. The heating-induced activation of diffusion processes is found to halve the number of micropores in the weld zone and to increase the tensile strength of the welded joint from 975 to 1108 MPa. The impact toughness of this joint after heat treatment corresponds to the initial impact toughness of the VT6 alloy.

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Funding

This work was performed in terms of Basic Research state assignment no. AAAA-A17-117041310221-5 for the Institute for Metals Superplasticity Problems, Russian Academy of Sciences.

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Correspondence to M. Kh. Mukhametrakhimov.

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Translated by T. Gapontseva

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Mukhametrakhimov, M.K. Effect of Heat Treatment on the Structure and Mechanical Properties of the Solid-Phase VT6 Alloy Welded Joint with an Ultrafine-Grained VT22 Alloy Interlayer. Russ. Metall. 2022, 391–395 (2022). https://doi.org/10.1134/S003602952204022X

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  • DOI: https://doi.org/10.1134/S003602952204022X

Keywords:

  • ultrafine-grained titanium alloy
  • low-temperature superplasticity
  • solid-phase compound
  • pressure welding
  • mechanical properties