Effect of intermetallic compounds on the fracture behavior of dissimilar friction stir welding joints of Mg and Al alloys

Amir Hossein Baghdadi, Zainuddin Sajuri, Nor Fazilah Mohamad Selamat, Mohd Zaidi Omar, Yukio Miyashita, Amir Hossein Kokabi

Research output: Contribution to journalArticle

Abstract

Joining Mg to Al is challenging because of the deterioration of mechanical properties caused by the formation of intermetallic compounds (IMCs) at the Mg/Al interface. This study aims to improve the mechanical properties of welded samples by preventing the fracture location at the Mg/Al interface. Friction stir welding was performed to join Mg to Al at different rotational and travel speeds. The micro structure of the welded samples showed the IMCs layers containing Al12Mg17 (γ) and Al3Mg2 (β) at the welding zone with a thickness (> 3.5 <m). Mechanical properties were mainly affected by the thickness of the IMCs, which was governed by welding parameters. The highest tensile strength was obtained at 600 r/min and 40 mm/rnin with a welding efficiency of 80%. The specimens could fracture along the boundary at the thermo-mechanically affected zone in the Mg side of the welded joint.

Original languageEnglish
Pages (from-to)1285-1298
Number of pages14
JournalInternational Journal of Minerals, Metallurgy and Materials
Volume26
Issue number10
DOIs
Publication statusPublished - 1 Oct 2019

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Friction stir welding
welding
Intermetallics
Welding
friction
mechanical property
Mechanical properties
Joining
Deterioration
Welds
Tensile strength
tensile strength
microstructure
Microstructure
effect

Keywords

  • aluminum alloy
  • dissimilar welded joint
  • friction stir welding
  • intermetallic compounds
  • magnesium alloy

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Geochemistry and Petrology
  • Metals and Alloys
  • Materials Chemistry

Cite this

Effect of intermetallic compounds on the fracture behavior of dissimilar friction stir welding joints of Mg and Al alloys. / Baghdadi, Amir Hossein; Sajuri, Zainuddin; Selamat, Nor Fazilah Mohamad; Omar, Mohd Zaidi; Miyashita, Yukio; Kokabi, Amir Hossein.

In: International Journal of Minerals, Metallurgy and Materials, Vol. 26, No. 10, 01.10.2019, p. 1285-1298.

Research output: Contribution to journalArticle

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AU - Kokabi, Amir Hossein

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