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Investigation of the grain coarsening behavior of some Aluminum alloys

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Abstract

Grain coarsening tests were carried out on Al-4.5 pct Cu and Al-4.5 pct Si alloys. The effects of three variables, melt composition, pour temperature, and mold temperature, were determined. It was found that the macrostructure generally coarsened with increased pour and mold temperatures. Coarsening was extreme in the unrefined alloys but was retarded by the active grain refiners like titanium and columbium. The effect of boron was spectacular in suppressing coarsening tendencies. The results of the investigation support the carbide theory of nucleation as opposed to the peritectic theory.

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References

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Author information

Authors and Affiliations

  1. U. S. Naval Gun Factory, Washington, D. C., USA

    Harold Bernstein (Metallurgist)

Authors
  1. Harold Bernstein
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Additional information

Discussion on this paper, TP 3755E, may be sent, 2 copies, to AIME by July 1, 1954. Manuscript, July 7, 1953. New York Meeting, February 1954.

This paper is based on a thesis by Mr. Bernstein submitted in partial fulfillment of the requirements for the degree of Master of Science in Metallurgy to the University of Maryland.

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Bernstein, H. Investigation of the grain coarsening behavior of some Aluminum alloys. JOM 6, 603–606 (1954). https://doi.org/10.1007/BF03398880

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  • DOI: https://doi.org/10.1007/BF03398880

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