Journal of Materials Science

, Volume 15, Issue 3, pp 685–692 | Cite as

Rapid solidification and decomposition of a hypomonotectic Al-Cd alloy

  • K. Chattopadhyay
  • P. Ramachandrarao


Rapid solidification of Al-1.5at % Cd alloy can lead to a wide variety of morphologies. The sequence of the morphologies with increasing foil thickness is single phase → elongated cell → hexagonal cell → dendrite. Monotectic reaction ahead of the solid-liquid interface leads to a unique distribution of the cadmium particles. Models are proposed to explain the genesis of the distribution of these particles. The study of the decomposition behaviour confirms the existence of a preprecipitation stage. The G.P. zones are found to be spherical and lead to a precipitate-free zone near grain/cell boundaries. The coarsening of the precipitates at liquid temperatures takes place by the migration and coalescence of the droplets.


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Copyright information

© Chapman and Hall Ltd. 1980

Authors and Affiliations

  • K. Chattopadhyay
    • 1
  • P. Ramachandrarao
    • 1
  1. 1.Department of Metallurgical EngineeringBanaras Hindu UniversityVaranasiIndia

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