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Dendrite coherency during equiaxed solidification in binary aluminum alloys

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Abstract

Dendrite coherency, or dendrite impingement, is important to the formation of the solidification structure and castability of alloys. Dendrite coherency in the systems Al-xMn, Al-xCu, Al-xFe, and Al-xSi(x = 0 to 5 wt pct) has been studied by continuous torque measurement in solidifying samples. The fraction solid at the dendrite coherency point, fs*, varies with the alloy system and the solute concentration in the alloy, from 18 to 56 pct for the present alloys investigated. An increase in solute concentration decreases the coherency fraction solid,fs*. An alloy system with a large slope of the liquidus line has a high coherency fraction solid. A theoretical approach has been developed to account for the effects of the alloy system and solute concentration on the dendrite coherency in the alloy. The grain sizes of the alloys were evaluated using the parameters at coherency point.

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References

  1. I. Maxwell and A. Hellawell:Acta Metall., 1975, vol. 23, pp. 229–37.

    Article  CAS  Google Scholar 

  2. J.D. Hunt:Mater. Sci. Eng., 1984, vol. 65, pp. 75–83.

    Article  CAS  Google Scholar 

  3. I. Dustin and W. Kurz:Z. Metallkd., 1986, vol. 77, pp. 265–73.

    CAS  Google Scholar 

  4. M. Rappaz and Ph. Thévoz:Acta Metall., 1987, vol. 35, pp. 1487–97.

    Article  CAS  Google Scholar 

  5. M. Rappaz and Ph. Thévoz:Acta Metall., 1987, vol. 35, pp. 2929–33.

    Article  CAS  Google Scholar 

  6. L. Nastac and D.M. Stefanescu: inProc. on Modelling of Casting, Welding and Advanced Solidification Processes V, T.S. Piwonka, V. Voller, and L. Katgerman, eds., TMS, Warrendale, PA, 1993, pp. 209–17.

    Google Scholar 

  7. S.A. Metz and M.C. Flemings:AFS Trans., 1970, vol. 78, pp. 453–60.

    Google Scholar 

  8. D.B. Spencer, R. Mehrabian, and M.C. Flemings:Metall. Trans., 1972, vol. 3, pp. 1925–32.

    Article  CAS  Google Scholar 

  9. R.J. Claxton :J. Met., 1975, Feb., pp. 14-16.

  10. R. Kiusalaas:Chem. Comm., Stockholm, 1986, No. 1, p. 102.

  11. G. Chai:Chem. Comm., Stockholm, 1994, No. 1, p. 15.

  12. L. BÄckerud, G. Chai, and J. Tamminen:Solidification Characteristics of Aluminium Alloys Vol. 2, Foundry Alloys, AFS/Skanaluminium, Oslo, Norway, 1988, pp. 3–11.

    Google Scholar 

  13. J. Tamminen:Chem. Comm., Stockholm, 1988, No. 2, pp. 8-33.

  14. T.B. Massalski:Binary Phase Diagram, ASM INTERNATIONAL, Materials Park, OH, 1990, vol. 1.

    Google Scholar 

  15. G. Chai:Chem. Comm., Stockholm, 1994, No. 1, p. 59.

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Authors and Affiliations

  1. Department of Structural Chemistry, Arrhenius Laboratory, Stockholm University, S-10691, Stockholm, Sweden

    Guocai Chai Ph.D. & Lennart BÄckerud (Professor)

  2. Department of Metallurgy, Norwegian Institute of Technology, N-7034, Trondheim, Norway

    Tone RØlland (Doctoral Candidate) & Lars Arnberg (Professor)

Authors
  1. Guocai Chai Ph.D.
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  2. Lennart BÄckerud
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  3. Tone RØlland
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  4. Lars Arnberg
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Chai, G., BÄckerud, L., RØlland, T. et al. Dendrite coherency during equiaxed solidification in binary aluminum alloys. Metall Mater Trans A 26, 965–970 (1995). https://doi.org/10.1007/BF02649093

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  • DOI: https://doi.org/10.1007/BF02649093

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