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Examination of the Strength of Oxide Skins on Aluminum Alloy Melts

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Abstract

The strength of solid oxide skins on Al melts was determined by measuring the maximum force that a skin extended between two moving dies can tolerate before cracking. Two apparatuses were constructed, one with linear motion of plate-shaped dies and one with a rotating disk inside a ring. Using the linear method, individual crack processes can be studied under defined stress conditions with a moderate reproducibility of ± 25 pct. With the rotating method a relative strength parameter is measured with an accuracy of ± 3 pct. By relatively simple tests the effect of melt temperature, oxidation time, and alloy additions can be determined. Examples are given for pure and primary Al, pure Al with Be, Na, Li, Ca, and Si additions, and for some commercial AlMg and AISi alloys.

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Authors and Affiliations

  1. Leichtmetall Gesellschaft, MBH D-4300, Essen-Borbeck, Germany

    W. Kahl

  2. Max-Planck-Institut für Metall-forschung, Institut für Werkstoffwissenschaften, Seestraβe 92, D 7000, Stuttgart 1, West Germany

    E. Fromm (Research Scientist)

Authors
  1. W. Kahl
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  2. E. Fromm
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W. Kahl, formerly Ph.D. Student at the Max-Planck-Institut.

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Kahl, W., Fromm, E. Examination of the Strength of Oxide Skins on Aluminum Alloy Melts. Metall Trans B 16, 47–51 (1985). https://doi.org/10.1007/BF02657487

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  • DOI: https://doi.org/10.1007/BF02657487

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