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Russian Metallurgy (Metally)

, Volume 2019, Issue 11, pp 1195–1204 | Cite as

Effect of the Deformation during Pressure Welding of a Wrought EP975 Nickel Alloy and a Single-Crystal Intermetallic VKNA-25 Alloy on the Structure and Properties of the Welded Joints

  • A. A. DrozdovEmail author
  • K. B. Povarova
  • V. A. Valitov
  • O. A. Bazyleva
  • E. V. Galieva
  • M. A. Bulakhtina
  • E. G. Arginbaeva
Article

Abstract

The influence of the strain (24, 30, 40%) during the pressure welding (PW) of an EP975 alloy in a superplasticity state and subsequent high-temperature heat treatment of welded joints on their structure and room-temperature mechanical properties is studied to find the conditions of PW of a single-crystal [001] Ni3Al-based VKNA-25 blade alloy and an EP975 disk alloy in order to fabricate a blisk. The tensile strength of the welded samples is found to be maximal after PW of the EP975 alloy at a strain of ~40%, and the strength reached at lower strains is also sufficiently high, 0.7–0.8 of the strength of the VKNA-25 blade alloy. To optimize the technology of solid-phase joining, it is reasonable to decrease the PW strain to 20% and to increase the welding temperature to 1175°C.

Keywords:

solid-phase joining superplasticity pressure welding strain wrought nickel superalloy cast intermetallic alloy single crystal structure diffusion properties 

Notes

FUNDING

This work was supported by the Russian Science Foundation, project no. 18-19-00685.

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Copyright information

© Pleiades Publishing, Ltd. 2019

Authors and Affiliations

  • A. A. Drozdov
    • 1
    • 2
    • 3
    Email author
  • K. B. Povarova
    • 2
  • V. A. Valitov
    • 1
  • O. A. Bazyleva
    • 4
  • E. V. Galieva
    • 1
  • M. A. Bulakhtina
    • 1
    • 2
  • E. G. Arginbaeva
    • 1
    • 4
  1. 1.Institute for Metals Superplasticity Problems, Russian Academy of SciencesUfaRussia
  2. 2.Baikov Institute of Metallurgy and Materials Science, Russian Academy of SciencesMoscowRussia
  3. 3.Bardin Central Research Institute for Ferrous MetallurgyMoscowRussia
  4. 4.All-Russia Research Institute of Aviation MaterialsMoscowRussia

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