Journal of Materials Engineering and Performance

, Volume 27, Issue 4, pp 1544–1554 | Cite as

Microstructure and Mechanical Characterization of Friction-Stir-Welded Dual-Phase Brass

  • R. Ramesh
  • I. Dinaharan
  • E. T. Akinlabi
  • N. Murugan


Friction stir welding (FSW) is an ideal process to join brass to avoid the evaporation of zinc. In the present investigation, 6-mm-thick dual-phase brass plates were joined efficiently using FSW at various tool rotational speeds. The microstructures were studied using optical microscopy, electron backscattered diffraction and transmission electron microscopy. The optical micrographs revealed the evolution of various zones across the joint line. The microstructure of the heat-affected zone was similar to that of base metal. The weld zone exhibited finer grains due to dynamic recrystallization. The recrystallization was inhomogeneous and the inhomogeneity reduced with increased tool rotational speed. The dual phase was preserved in the weld zone due to the retention of zinc. The severe plastic deformation created a lot of dislocations in the weld zone. The weld zone was strengthened after welding. The role of tool rotational speed on the joint strength is further reported.


brass friction stir welding microstructure tensile strength 



The authors are grateful to Welding Research Cell at Coimbatore Institute of Technology, Microscopy Lab at University of Johannesburg, OIM and Texture Lab at Indian Institute of Technology Bombay, National Institute of Technology Calicut and PSG College of Technology Coimbatore, for providing the facilities to carry out this investigation.


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Copyright information

© ASM International 2018

Authors and Affiliations

  • R. Ramesh
    • 1
  • I. Dinaharan
    • 2
  • E. T. Akinlabi
    • 2
  • N. Murugan
    • 3
  1. 1.Department of Mechanical EngineeringPSG College of TechnologyCoimbatoreIndia
  2. 2.Department of Mechanical Engineering ScienceUniversity of JohannesburgJohannesburgSouth Africa
  3. 3.Department of Robotics and Automation EngineeringPSG College of TechnologyCoimbatoreIndia

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