• Effects and mechanisms of grain refinement in aluminium alloys

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    • Keywords


      Grain refinement; nucleant effects; solute effects; Al–Ti–B master alloy.

    • Abstract


      Grain refinement plays a crucial role in improving characteristics and properties of cast and wrought aluminium alloys. Generally Al–Ti and Al–Ti–B master alloys are added to the aluminium alloys to grain refine the solidified product. The mechanism of grain refinement is of considerable controversy in the scientific literature. The nucleant effects i.e. which particle and its characteristics nucleate 𝛼-Al, has been the subject of intensive research. Lately the solute effect i.e. the effect of dissolved titanium on grain refinement, has come into forefront of grain refinement research. The present paper attempts to review the literature on the nucleant effects and solute effects on grain refinement and addresses the importance of dissolved titanium in promoting nucleation of 𝛼-Al on nucleant particles.

    • Author Affiliations


      K T Kashyap1 T Chandrashekar2

      1. Central Laboratory, Foundry and Forge Division, Hindustan Aeronautics Ltd., Bangalore 560 017, India
      2. Department of Mechanical Engineering, M.S. Ramaiah Institute of Technology, Bangalore 560 054, India
    • Dates

  • Bulletin of Materials Science | News

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