Effect of the gap width in AZ31 magnesium alloy joints obtained by friction stir welding

Publikation: Beiträge in ZeitschriftenZeitschriftenaufsätzeForschungbegutachtet

Authors

  • Fernanda Rocha Chiuzuli
  • Bruna Fernanda Batistão
  • Luciano Andrei Bergmann
  • Nelson Guedes de Alcântara
  • Jorge Fernandez dos Santos
  • Benjamin Klusemann
  • Piter Gargarella

Thin AZ31 magnesium alloy sheets, i.e., 2 mm thick, are welded by Friction Stir Welding (FSW) in butt joint configuration using gap width up to 1.15 mm. All welds present good surface finishing and no internal defects, except for the weld produced using the maximum gap width. A reduction of the weld thickness within the Stir Zone is seen with the increase in gap width, leading to a maximum thickness reduction of 8.5%. Microstructure and Vickers hardness investigations reveal no influence of the gap width on these properties. Up to a gap width of 0.51 mm, a slight decrease in the Ultimate Tensile Strength (UTS) is observed with increasing gap width. For larger gap widths, the UTS, as well as the fracture strain, are constant. To keep the metallurgical integrity, a maximum gap width of 1 mm seems acceptable for joints of thin AZ31 magnesium alloy sheets produced by FSW.

OriginalspracheEnglisch
ZeitschriftJournal of Materials Research and Technology
Jahrgang15
Seiten (von - bis)5297-5306
Anzahl der Seiten10
ISSN2238-7854
DOIs
PublikationsstatusErschienen - 01.11.2021

Bibliographische Notiz

This study was financed in part by the support of the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior – Brasil (CAPES) – Finance Code 001. The authors also thank the grant #2019/04613–3, São Paulo Research Foundation ( FAPESP ).

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