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A modified system for predicting σ formation

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Abstract

A new method is proposed for predicting the ō-phase susceptibility of high-temperature superalloys. It is based on modifications of previous methods which involve electron-vacancy correlations. A calculated critical electron-vacancy number unique to each residual matrix composition is compared to the total electron-vacancy concentration (N V) for the residual matrix. The new method has been applied to experimentally determined residual matrix compositions (i.e. the composition of a matrix after all early precipitates have formed) of nickel-and cobalt-base superalloys. The modification exhibits a greater range of applicability to various austenitic alloy compositions than do current electron-vacancy tools.

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References

  1. R. L. Dreshfield:Met. Trans., 1971, vol. 2, pp. 1341–46.

    CAS  Google Scholar 

  2. H. J. Beattie Jr. and W. C. Hagel:Trans. TMS-AIME, 1965, vol. 233, pp. 277–87.

    CAS  Google Scholar 

  3. C. T. Sims:J.Metals, 1969, vol. 21, no. 12, pp. 2742.

    Google Scholar 

  4. E.W. Ross:J. Metals, 1967, vol. 19, no. 12, pp. 12–14.

    CAS  Google Scholar 

  5. R. L. Dreshfield and R. L. Ashbrook:NASA TND-5185, Washington, D.C., 1969.

  6. W. L. Boesch and J. S. Slaney:Metal Progr., 1964, vol. 86, pp. 109–11.

    CAS  Google Scholar 

  7. L. R. Woodyat, C. T. Sims, and H. J. Beattie Jr.:Trans. TMS-AIME, 1966, vol. 236, pp. 519–27.

    Google Scholar 

  8. International Symposium on Structural Stability in Superalloys, vols, I and II, Seven Springs, Pa., September 4–6,1968.

  9. S. Rideout, W. D. Manly, E. L. Kamen, B. S. Lement, and P. A. Beck:AIME Trans., 1951, vol. 191, pp. 872–76.

    Google Scholar 

  10. P. Greenfield and P. A. Beck:AIME Trans., 1954, vol. 200, pp. 253–57.

    Google Scholar 

  11. H. J. Murphy, C. T. Sims, and A. M. Beltran:J. Metals, 1968, vol. 20, no. 12, pp. 46–54.

    CAS  Google Scholar 

  12. J. R. Mihalisin and D. L. Pasquine:International Symposium on Structural Stability in Superalloys, pp. 134–71, Seven Springs, Pa., 1968.

  13. O. H. Kriege and J. M. Baris:Trans. ASM, 1969, vol. 62, pp. 195–200.

    CAS  Google Scholar 

  14. M. Hansen and P. Anderko:Constitution of Binary Alloys, 2nd ed., McGraw-Hill Book Co., New York, 1958.

    Google Scholar 

  15. R. P. Elliott:Constitution of Binary Alloys, First Supplement, McGraw-Hill Book Co., New York, 1965.

    Google Scholar 

  16. F. A. Shunk:Constitution of Binary Alloys, Second Supplement, McGraw-Hill Book Co., New York, 1969.

    Google Scholar 

  17. H. E. Collins and C. S. Kortovich:J. Mater., March 1969, vol. 4, no. 1, pp. 62–91.

    CAS  Google Scholar 

  18. C. B. Shoemaker and D. P. Shoemaker: inDevelopments in the Structural Chemistry of Alloy Phases, B. C. Giessen, ed., p. 107, Plenum Press, New York, 1969.

    Chapter  Google Scholar 

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Authors and Affiliations

  1. U. S. Army Air Mobility Research and Development Laboratory, NASA-Lewis Research Center, 44135, Cleveland, Ohio

    R. G. Barrows (Materials Engineer)

  2. Department of Chemical Engineering and Metallurgy, University of Denver Research Institute, 80210, Denver, Colorado

    J. B. Newkirk (Brainerd F. Phillipson Professor)

Authors
  1. R. G. Barrows
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  2. J. B. Newkirk
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R. G. BARROWS, formerly Graduate Research Assistant, University of Denver, Denver, Colorado 80210

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Barrows, R.G., Newkirk, J.B. A modified system for predicting σ formation. Metall Trans 3, 2889–2893 (1972). https://doi.org/10.1007/BF02652857

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