Effects of process parameters on the evolving properties of dissimilar aluminium-copper friction stir welds

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


This paper reports the effect of processing parameters on the evolving properties of friction stir joints between 5754 Aluminium Alloy and C11000 Copper. The welds were produced by varying the rotational speed between 600 and 1200 rpm and the traverse speed varied between 50 and 300 mm/min. The welds were characterized through microstructure, microhardness, tensile testing and electrical resistivity. The weld cross sections revealed that good mixing of both materials joined was better achieved at the low traverse speed of 50 mm/min. It was observed that the Ultimate Tensile Strength (UTS) of the welds decreases as the welding speed increases due to better material flow and transport of materials during the welding process at low travel speeds. Higher Vickers microhardness values were measured in the Thermomechanically Affected Zones (TMAZ) and the Stir Zones (SZ) due to plastic deformation that has occurred during the welding process and also due to the presence of intermetallic compounds at the interface. These higher Vickers microhardness values were observed mostly in welds produced at 50 and 150 mm/min, welds produced at 300 mm/min have a fairly flat profile due to low heat input into these welds. At constant rotational speeds, it was observed that the joint electrical resistivities of the welds increases as the traverse speed decreases due to the heat input to the welds.

Original languageEnglish
Title of host publicationTrends in Welding Research - Proceedings of the 9th International Conference
Number of pages5
Publication statusPublished - 2013
Event9th International Conference on Trends in Welding Research - Chicago, IL, United States
Duration: 4 Jun 20128 Jun 2012

Publication series

NameASM Proceedings of the International Conference: Trends in Welding Research


Conference9th International Conference on Trends in Welding Research
Country/TerritoryUnited States
CityChicago, IL


  • Aluminium alloy
  • Copper
  • Electrical resistivity
  • Friction stir welding and microstructural characterisation

ASJC Scopus subject areas

  • General Materials Science
  • Mechanical Engineering


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