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Inhomogeneities and their control via solidification

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Abstract

A review is presented on the origin of inhomogeneities and their type, quantity, distribution, and scale which arise in a solidification process. Microscopic inhomogeneity originates from dendritic growth as dendritic segregation and can lead to precipitation of secondary phases in the interdendritic interstices. Precipitation of high temperature phases, grain boundary segregation, and porosity are also discussed. Macroscopic inhomogeneities are considered as arising from macrosegregation due to thermal and constitutional convection, inverse segregation and gravity segregation. Structure can be varied by variations of composition, alterations in the thermal environment and additions of external force fields, and this is discussed from the viewpoint of promoting a more homogeneous solid.

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Authors and Affiliations

  1. Process Research Department, Ford Motor Co., Dearborn, Mich.

    G. S. Cole (Scientific Research Staff)

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  1. G. S. Cole
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Additional information

This paper is based on an invited talk presented at a symposium on Homogenization of Alloys, sponsored by the IMD Heat Treatment Committee, and held on May 11, 1970, at the spring meeting of The Metallurgical Society of AIME, in Las Vegas, Nev.

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Cole, G.S. Inhomogeneities and their control via solidification. Metall Trans 2, 357–370 (1971). https://doi.org/10.1007/BF02663323

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