Retardation of Grain Growth in Al 3003 Nanocomposite Weldment Using ARB Filler Metal

  • K. R. Ramkumar
  • S. NatarajanEmail author


This research demonstrates the feasibility of filler rod fabrication to develop nanocomposite weldment to enhance the joint strength via ARB technique. Al 3003 alloys were joined through GTAW by melting fabricated nanocomposite filler metal. TiO2 nanoparticles were chosen as reinforcement from 0 to 3 wt%. Roll bonding is desired owing to the proper distribution of TiO2 particles. SEM depicted the distribution of reinforcement particles in the grain boundaries. TEM disclosed the uniformity in particulates distribution, peening of dislocation and strain fields in 12 wt% TiO2 reinforced nanocomposite weldment. EBSD portrayed the grain refinement occurred in the weld zone due to reinforcement addition. The improvement in impact and bending strength were due to excellent bonding between the Al and reinforcement particles and excellent load transfer ability provided by reinforcement particles.

Graphic Abstract


Al TiO2 Nanocomposite ARB, GTAW Bending Impact 





Accumulative roll bonding


Bending strength


Carbon nanotubes


Coefficient of thermal expansion


Electron back scattered diffraction image


Graphene nanosheets


Grain size


Gas tungsten arc welding




Impact strength

l × b × t

Length × breadth × thickness


Metal matrix composites


Selective area diffraction


Scanning electron microscopy


Transmission electron microscopy


Titanium dioxide


Ultimate tensile strength


X ray diffraction



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Copyright information

© The Korean Institute of Metals and Materials 2020

Authors and Affiliations

  1. 1.Centre of Excellence in Corrosion and Surface Engineering (CECASE)National Institute of TechnologyTiruchirappalliIndia

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