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A practical method for identifying inoculants

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Abstract

The macrostructure of an ingot can be altered by controlling the fluid flow during solidification. Such control produces drastically different results depending on whether a solute addition acts as an inoculating agent (involving a low proportion of a nucleating second phase) or if it is mostly soluble and forms a second phase only as a result of microsegregation. This differentiation, previously shown for Al and some of its alloys, is repeated with magnesium containing zirconium, which is a known inoculant for Mg. Copper is then tested as an addition to lead. Its action allows the production of very curious macroscopic grain structures which will be shown to be characteristic of an inoculant. Subsequent tests support the validity of applying fluid flow structure-control as a method for identifying inoculants.

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Authors and Affiliations

  1. Ford Motor Company, 48121G. F., Dearborn, Michigan

    G. S. Cole (Scientific Research Staff) & K. W. Casey (Scientific Research Staff)

  2. Product Planning and Research Staff, Ford Motor Company, 48121, Dearborn, Michigan

    G. F. Bulling

Authors
  1. G. S. Cole
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  2. K. W. Casey
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  3. G. F. Bulling
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Formerly with the Scientific Research Staff

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Cole, G.S., Casey, K.W. & Bulling, G.F. A practical method for identifying inoculants. Metall Trans 5, 407–411 (1974). https://doi.org/10.1007/BF02644108

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  • DOI: https://doi.org/10.1007/BF02644108

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