The structure and mechanical properties of VT23 welded joints with surface layer modified by ultrasonic mechanical forging

Anastasia Smirnova, Yury Pochivalov, Victor Panin, Anatoly Orishich, Alexander Malikov, Vasily Fomin, Anton Gorbunov

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

The structure and mechanical properties of welded joints of the VT23 titanium alloy received by method of laser welding after modifying the surface layers by ultrasonic mechanical forging (Treatment 1 and Treatment 2) were investigated. The experimental tests have revealed that the Treatment 2 provides a multiple increase in the relaxation property in fatigue life test. The formation of nonuniform distribution of vanadium, chromium and molybdenum in the welded joint increases the strength and, at the same time, the brittleness of β-phase. Mechanical treatment of the surface layers in the second mode provides a multiple increase in ductility up to 13%, in the asreceived condition up to 9.9%. In consequence of plastic deformation, the β-phase intensity reduces twice with Treatment 2 which is related to its clustering. As follows from a presented data, the fatigue life of the VT23 titanium alloy has increased more than threefold.

Original languageEnglish
Title of host publicationHigh Technology
Subtitle of host publicationResearch and Applications 2016 - HTRA-2016
PublisherTrans Tech Publications Ltd
Pages264-268
Number of pages5
Volume743 KEM
ISBN (Print)9783035711356
DOIs
Publication statusPublished - 2017
Event5th International Science and Engineering Conference on High Technology: Research and Applications, HTRA 2016 - Tomsk, Russian Federation
Duration: 5 Dec 20167 Dec 2016

Publication series

NameKey Engineering Materials
Volume743 KEM
ISSN (Print)1013-9826

Conference

Conference5th International Science and Engineering Conference on High Technology: Research and Applications, HTRA 2016
CountryRussian Federation
CityTomsk
Period5.12.167.12.16

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Keywords

  • Crystals twin
  • Nanostructural state
  • Titanium alloys VT23
  • Ultrasonic mechanical forging
  • Welded joints

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Smirnova, A., Pochivalov, Y., Panin, V., Orishich, A., Malikov, A., Fomin, V., & Gorbunov, A. (2017). The structure and mechanical properties of VT23 welded joints with surface layer modified by ultrasonic mechanical forging. In High Technology: Research and Applications 2016 - HTRA-2016 (Vol. 743 KEM, pp. 264-268). (Key Engineering Materials; Vol. 743 KEM). Trans Tech Publications Ltd. https://doi.org/10.4028/www.scientific.net/KEM.743.264