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A statistically significant experimental technique for investigating microsegregation in cast alloys

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Abstract

A simple, statistically significant experimental technique was developed to investigate microsegregation in a model cast Al-4.5 wt pct Cu alloy. This technique involves systematic composition measurements of the primary alloy phase of polished samples by use of the electron microprobe. The microprobe data were processed to obtain the detailed compositionvs fraction solid profile, which was an estimation of microsegregation of solute element in the sample. The number of data collected directly affected the statistical significance of the results. The results suggested that measurements of the order of 100 are adequate for obtaining statistically significant solute distribution profiles and, hence, for quantitatively determining the severity of microsegregation.

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  1. Composite Materials Technology Laboratory, Westinghouse Electric Corporation, Research and Development Center, 15235, Pittsburgh, PA

    M. N. Gungor (Senior Engineer)

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  1. M. N. Gungor
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Gungor, M.N. A statistically significant experimental technique for investigating microsegregation in cast alloys. Metall Trans A 20, 2529–2533 (1989). https://doi.org/10.1007/BF02666687

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