Journal of Materials Science

, Volume 15, Issue 3, pp 685–692

Rapid solidification and decomposition of a hypomonotectic Al-Cd alloy

  • K. Chattopadhyay
  • P. Ramachandrarao
Papers

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.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Copyright information

© Chapman and Hall Ltd. 1980

Authors and Affiliations

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

Personalised recommendations