Interface microstructure and mechanical properties of dissimilar friction stir welded joints between Zr 55Cu 30Ni 5Al 10 bulk metallic glass and pure Al

Yufeng Sun, Hidetoshi Fujii, Koichi Imagawa, Yoshihiko Yokoyama, Hisamichi Kimura, Akihisa Inoue

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Dissimilar friction stir welding of Zr 55Cu 30Ni 5Al 10 bulk metallic glass (BMG) to pure Al was carried out at different welding conditions. Sound BMG/Al joints can be obtained at a rotation speed of 350 and 400 rpm. However, defects or crack may form in the stir zone when the rotation speed was either too low or too high. In the sound joints, a clear and straight BMG/Al interface was formed and no intermetallic compounds caused either by chemical reaction or crystallization from the amorphous phase can be detected within the entire stir zone. The hardness of Al side in the stir zone decreases with increasing of the rotation speed and is lower than that in the base material due to frictional heat input. The sound BMG/Al joints fractured in the heat affect zone of Al side and the tensile strength can reach about 91% of that of the base material.

Original languageEnglish
Pages (from-to)1106-1112
Number of pages7
JournalMaterials Transactions
Volume53
Issue number6
DOIs
Publication statusPublished - 2012 Oct 5

Keywords

  • Bulk metallic glass
  • Crystallization
  • Friction stir welding
  • Interface
  • Stir zone

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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