Mechanical and structural evaluation of friction stir welded 6061 aluminium alloy lap joints at different welding speeds

F. Gharavi, F. Fadaeifard, K. A. Matori, R. Yunus, Norinsan Kamil Othman

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Lap joints of 6061-T6 aluminium alloy were produced by friction stir welding, and the influence of welding speed on their weld quality was investigated in terms of welding defects, micro- and macrostructures, hardness distribution, and tensile properties as well as effective plate thickness (EPT) by applying the welding speed in the range 20-60 mm min-1 at constant rotation speed of 1000 rpm. The results showed that although tensile shear strength, joint efficiency, and microhardness of the weld nugget zone (WNZ) rather than the heat affected zone (HAZ), and the EPT increased with an increase in welding speed, the average grain size in the WNZ rather than the HAZ decreased. Due to increasing welding speed, the hooking and thinning defects were gradually restricted from the WNZ to the WNZ/TMAZ interface. The fracture mode within the highest tensile shear strength joints was denoted as plate separation along the hook throughout the stir zone.

Original languageEnglish
Pages (from-to)351-361
Number of pages11
JournalKovove Materialy
Volume54
Issue number5
DOIs
Publication statusPublished - 2016

Fingerprint

Aluminum alloys
Welding
Welds
Friction
Heat affected zone
Shear strength
Friction stir welding
Defects
Hooks
Tensile properties
Microhardness
Hardness
Microstructure

Keywords

  • 6061 Aluminium alloy
  • Friction stir welding
  • Mechanical properties
  • Microstructure
  • Welding speed

ASJC Scopus subject areas

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

Cite this

Mechanical and structural evaluation of friction stir welded 6061 aluminium alloy lap joints at different welding speeds. / Gharavi, F.; Fadaeifard, F.; Matori, K. A.; Yunus, R.; Othman, Norinsan Kamil.

In: Kovove Materialy, Vol. 54, No. 5, 2016, p. 351-361.

Research output: Contribution to journalArticle

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AU - Yunus, R.

AU - Othman, Norinsan Kamil

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