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Effect of TiAl3 particles size and distribution on their settling and dissolution behaviour in aluminium

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Abstract

The effect of TiAl3 particle size and distribution on their settling and dissolution behaviour in molten aluminium during grain refinement has been studied. For this purpose Al–5Ti master alloys containing blocky TiAl3 particles of different size and distribution are synthesised at reaction temperatures 750, 800 and 850 °C for 60 min and used for grain refinement. The extent of fading and the recovery due to stirring is calculated from the measured grain size and used to judge the dissolution and settling behaviour of TiAl3 in molten Al, which is greatly attributed to its size and distribution in Al–5Ti master alloy. Fine TiAl3 particle dissolve faster in the melt and cause fading. Larger size TiAl3 particles exist for longer time in molten Al and act as a nucleating site even when added in hypoperitectic concentration (0.05 wt% Ti).

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Authors and Affiliations

  1. Department of Metallurgical and Materials Engineering, Indian Institute of Technology Kharagpur, Kharagpur, 721302, India

    G. S. Vinod Kumar & M. Chakraborty

  2. Department of Metallurgical and Materials Engineering, Indian Institute of Technology Madras, Chennai, 600035, India

    B. S. Murty

  3. Helmholtz Zentrum Berlin für Materialien und Energy, 100 Glienicker Straße, 14109, Berlin, Germany

    G. S. Vinod Kumar

Authors
  1. G. S. Vinod Kumar
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  2. B. S. Murty
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  3. M. Chakraborty
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Correspondence to G. S. Vinod Kumar.

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Vinod Kumar, G.S., Murty, B.S. & Chakraborty, M. Effect of TiAl3 particles size and distribution on their settling and dissolution behaviour in aluminium. J Mater Sci 45, 2921–2929 (2010). https://doi.org/10.1007/s10853-010-4284-z

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  • DOI: https://doi.org/10.1007/s10853-010-4284-z

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