Grain structure and impact toughness of Al-Li alloy joints formed by friction stir welding

A. V. Eremin, A. V. Byakov, T. A. Kalashnikova, M. V. Burkov, S. V. Panin

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


The paper presents the investigation of the grain structure of initial homogeneous aluminum alloy AA8090 and welded specimen using friction stir welding. An optical microscopic study reveals four zones in the welding seam. In order to evaluate deformation and fracture behavior, Charpy V-notch impact tests were performed with the recording of emitted acoustic signals (acoustic emission) and capturing of loading diagrams by the instrumented striker. The formation of a large area of grain boundaries in welded specimen leads to a significant increase in the energy required for the initiation and propagation of a crack under impact loading, while initial alloy demonstrates low impact toughness. Registered acoustic signal was further analyzed by means of wavelet spectrum.

Original languageEnglish
Title of host publicationOil and Gas Engineering, OGE 2019
EditorsAlexander V. Myshlyavtsev, Vladimir A. Likholobov, Vladimir L. Yusha
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735418844
Publication statusPublished - 28 Aug 2019
EventOil and Gas Engineering Conference, OGE 2019 - Omsk, Russian Federation
Duration: 26 Feb 201928 Feb 2019

Publication series

NameAIP Conference Proceedings
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616


ConferenceOil and Gas Engineering Conference, OGE 2019
CountryRussian Federation

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Ecology
  • Plant Science
  • Physics and Astronomy(all)
  • Nature and Landscape Conservation

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