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The effect of trace element additions on the grain boundary composition of Ir + 0.3 pct W alloys

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Abstract

The grain boundary fracture surfaces of several Ir + 0.3 pct W alloys have been examined using Auger electron spectroscopy. Dopant additions (between 10 and 80 wt ppm) of Al, Fe, Th, Ni and Rh are shown to result in thorium enriched grain boundaries. Inert ion sputtering experiments suggest that the thorium enriched region at the grain boundaries is probably only a few atom layers thick. The other dopants (Al, Fe, Ni and Rh) do not appear to influence the segregation of thorium, and their function (if any) in improving the high temperature impact properties of this alloy is unclear at this time.

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References

  1. C. T. Liu and H. Inouye:Development and Characterization of an Improved Ir-0.3% W Alloy for Space Radioisotopic Heat Sources, ORNL-5290, 1977.

  2. C. T. Liu and H. Inouye:Proceedings of the Second International Conference on Mechanical Behavior of Materials, pp. 1149–53, American Society for Metals, Metals Park, Ohio, 1976.

    Google Scholar 

  3. C. T. Liu:Isotopic Power Materials Quarterly Progress Report for Period EndingMarch 31,1976, ORNLJTM-5285, pp. 38–40,1976, available from NTIS, U.S.Department of Commerce, Springfield, Virginia.

  4. C. T. Liu:Isotopic Power Materials Quarterly Progress Report for Period Ending March 31, 1976, ORNLJTM-5482, pp. 25–28, 1976, available from NTIS, U.S. Department of Commerce, Springfield, Virginia.

    Google Scholar 

  5. C. T. Liu:Isotopic Power Materials Quarterly Progress Report for Period Ending June 30, 1976, ORNLJTM-5569, pp. 17–19,1976, Available from NTIS, U.S. Department of Commerce, Springfield, Virginia.

    Google Scholar 

  6. D. F. Stein, W. C. Johnson, and C. L. White:Can. Met. Quarter., 1974, vol. 13, no. 1, p. 79.

    CAS  Google Scholar 

  7. D. F. Stein, W. C. Johnson, and C. L. White:Grain Boundary Structure and Properties, G. A. Chadwick and D. A. Smith, ed., pp. 301–51, Academic Press, London, 1976.

    Google Scholar 

  8. L. E. Davis, N. C. MacDonald, P. W. Palmberg, G. E. Riach, and R. E. Weber:Handbook of Auger Electron Spectroscopy, 2nd ed., pp. 5–18, Physical Electronics Industries, Eden Prairie, MN, 1976.

    Google Scholar 

  9. G. K. Wehner:Methods of Surface Analysis, A. W. Czanderna, ed., pp. 5–37, Elsevier, New York, 1975.

    Google Scholar 

  10. E. N. Sickafus:J. Vac. Sci. Technol, 1974, vol. 11, no. 1, pp. 299–311.

    Article  CAS  Google Scholar 

  11. R. W. Douglass, C. A. Krier, and R. I. Jaffee: Battelle Memorial Institute Report NP-10939, August 1961.

  12. C. A. Brooks, J. H. Greenwood, and J. L. Routbort;J. Appl. Phys., 1968, vol. 39, pp. 2391–95.

    Article  Google Scholar 

  13. S. S. Hecker, D. L. Rohr, and D. F. Stein:Met. Trans. A, 1978, vol. 9A, pp. 481–88.

    Article  CAS  Google Scholar 

  14. F. C. Holden, R. W. Douglass, and R. I. Jaffee:Symposium on Newer Metals, pp. 68–79, ASTM-STP-272, 1960.

  15. R. W. Douglass and R. I. Jaffee:Proc. ASTM, 1967, vol. 62, pp. 627–37.

    Google Scholar 

  16. C. T. Liu and H. Inouye:Study of Iridium and Iridium-Tungsten Alloys for Space Radioisotopic Heat Sources, ORNL-5240, 1976, available from NTIS, U.S. Department of Commerce, Springfield, Virginia.

    Google Scholar 

  17. H. Hieber, B. L. Mordike and P. Haasen:Plat. Met. Rev., 1964, vol. 8, pp. 102–06.

    CAS  Google Scholar 

  18. C. A. Brookes, H. J. Greenwood, and R. L. Routbort:J. Inst. Met., 1970, vol. 98, pp. 27–31.

    CAS  Google Scholar 

  19. L. E. Murr and O. T. Inal:Met. Eng. Quart., pp. 29–34, August 1972.

  20. L. E. Murr, O. T. Inal, and G. I. Wong:Electron Microscopy and Structure of Materials; G. Thomas, R. M. Fulrath, and R. M. Fisher, eds., p. 417, University of California Press, Berkeley, CA, 1972.

    Google Scholar 

  21. P. S. Sklad, R. E. Clausing, and E. E. Bloom: ASTM STP 611, pp. 139–55, American Society for Testing and Materials, 1976.

  22. R. E. Clausing and E. E. Bloom:Proc. Fourth Bolton Landing Conf, J. L. Walter, J. H. Westbrook, and D. A. Woodford, eds., pp. 491–503, Claitors Publishing Div. Baton Rouge, LA 1975.

    Google Scholar 

  23. R. D. McLellan and W. A. Oates:Acta Met, 1973, vol. 21, pp. 181–85.

    Article  CAS  Google Scholar 

  24. D. A. Smith, T. F. Page, and B. Ralph:Philos. Mag., 1969, vol. 19, pp. 231–40.

    CAS  Google Scholar 

  25. C. N. Reid and J. L. Routbort:Met. Trans., 1972, vol. 3, pp. 2257–60.

    Article  CAS  Google Scholar 

  26. A. Kelly, W. R. Tyson, and A. H. Cottrell:Philos. Mag., 1974, vol. 29, pp. 73–97.

    Google Scholar 

  27. E. D. Hondros and D. McLean:Grain Boundary Structure and Properties, G. A. Chadwick and D. A. Smith, eds., pp. 353–81, Academic Press, London, 1976.

    Google Scholar 

  28. D. McLean:Grain Boundaries in Metals, pp. 116–49, Clarendon Press, Oxford, 1957.

    Google Scholar 

  29. E. D. Hondros:J. De Physique, October 1975, Tome 36, Coll. C-4 Suppl. No. 10, pp. 117–34.

    Google Scholar 

  30. D. F. Stein, A. Joshi, and R. P. LaForce:Trans. ASM, 1969, vol. 62, pp. 776–83.

    CAS  Google Scholar 

  31. P. V. Ramasubramanian and D. F. Stein:Met. Trans., 1973, vol. 4, pp. 1735–42.

    CAS  Google Scholar 

  32. A. Joshi and D. F. Stein:Met. Trans., 1970, vol. 1, pp. 2543–46.

    CAS  Google Scholar 

  33. A. Joshi and D. F. Stein:J. Inst. Metals, 1971, vol. 99, pp. 178–81.

    CAS  Google Scholar 

  34. J. R. Low:Trans. TMS-AIME, 1969, vol. 245, pp. 2481–94.

    CAS  Google Scholar 

  35. J. E. Doherty, A. F. Giamei, and B. H. Kear:Can. Met. Quart., 1974, vol. 13(1), pp. 229–36.

    CAS  Google Scholar 

  36. W. C. Johnson, J. E. Doherty, B. H. Kear, and A. F. Gaimei:Scripta Met, 1974, vol. 8, pp. 971–74.

    Article  CAS  Google Scholar 

  37. R. F. Decker and C. T. Sims:The Superalloys, C. T. Sims and C. Hagel, eds., p. 64, John Wiley and Sons, New York, 1972.

    Google Scholar 

  38. M. P. Seah:Proc. Roy. Soc. London, 1976, vol. A349, pp. 535–54.

    Google Scholar 

  39. A. Joshi and D. F. Stein:Met. Trans., 1970, vol. 1, pp. 2543–46.

    CAS  Google Scholar 

  40. A. W. Thompson: “Grain Boundaries in Engineering Materials,”Proc. Fourth Bolton Landing Conf, J. L. Walter, J. H. Westbrook, and D. A. Woodford, eds., pp. 607–18, Claitors Publishing Division, Baton Rouge, LA, 1974.

    Google Scholar 

  41. L. White and D.F. Stein,Met. Trans. A, 1978, vol. 9A, pp. 13–22.

    Article  CAS  Google Scholar 

  42. D. D. Mason:Segregation Induced Embrittlement of Grain Interfaces, USERDA E(l 1-1)8084J52, 1977, M.S. thesis, Brown University, Providence, RI.

    Google Scholar 

  43. J. R. Rice:Effect of Hydrogen on Behavior of Materials, A. W. Thompson and I. M. Bernstein, eds., pp. 5–37, TMS-AIME, New York, 1976.

    Google Scholar 

  44. C. J. Smithells:Metals Reference Book, vol. 1, fourth edition, pp. 140–41, Plenum Press, New York, 1967.

    Google Scholar 

  45. F. A. Shunk:Constitution of Binary Alloys, Second Supplement, p. 466, McGraw-Hill, New York, 1969.

    Google Scholar 

  46. C. L. White: unpublished research, Oak Ridge National Laboratory, Oak Ridge, TN, 1978.

  47. M. Hansen:Constitution of Binary Alloys, 2nd edition, p. 662, McGraw-Hill, New York, 1958.

    Google Scholar 

  48. W. G. Moffatt:Binary Phase Diagrams Handbook, General Electric, New York, 1976.

    Google Scholar 

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Authors and Affiliations

  1. Metals and Ceramics Division, Oak Ridge National Laboratory, 37830, Oak Ridge, TN

    Calvin L. White (Research Staff Member), Robert E. Clausing (Research Staff Member) & Lee Heatherly (Senior Laboratory Technician)

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  1. Calvin L. White
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  2. Robert E. Clausing
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  3. Lee Heatherly
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White, C.L., Clausing, R.E. & Heatherly, L. The effect of trace element additions on the grain boundary composition of Ir + 0.3 pct W alloys. Metall Trans A 10, 683–691 (1979). https://doi.org/10.1007/BF02658389

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  • DOI: https://doi.org/10.1007/BF02658389

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