Journal of Materials Science

, Volume 15, Issue 3, pp 685–692

Rapid solidification and decomposition of a hypomonotectic Al-Cd alloy

Authors

  • K. Chattopadhyay
    • Department of Metallurgical EngineeringBanaras Hindu University
  • P. Ramachandrarao
    • Department of Metallurgical EngineeringBanaras Hindu University
Papers

DOI: 10.1007/BF00551735

Cite this article as:
Chattopadhyay, K. & Ramachandrarao, P. J Mater Sci (1980) 15: 685. doi:10.1007/BF00551735

Abstract

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.

Copyright information

© Chapman and Hall Ltd. 1980