Considerations in the Development of Tantalum Base Alloys

  • R. W. BuckmanJr.
  • R. C. Goodspeed


This paper reviews the alloying behavior of tantalum with discussion being restricted primarily to the effects of the alloying additions tungsten, hafnium, rhenium, and carbon. The effect of each of these additions on tensile strength, fabricability, and creep behavior is discussed. The status of current commercially available tantalum base alloys is presented and the potential strength limit of alloy compositions which retain room temperature ductility is proposed.


Refractory Metal Creep Strength Tungsten Alloy Quarterly Report Space Nuclear Power System 
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  1. 1.
    F. F. Schmidt, “Tantalum and Tantalum Alloys”, DMIC Report 133, July 25, 1960.Google Scholar
  2. 2.
    F. F. Schmidt and H. R. Ogden, “The Engineering Properties of Tantalum and Tantalum Alloys”, DMIC Report 189, September 13, 1963.Google Scholar
  3. 3.
    F. F. Schmidt, E. S. Bartlett, and H. R. Ogden, “Investigation of Tantalum and Its Alloys”, Technical Documentary Report No. ASD-TDR-62–594, Part II, May, 1963.Google Scholar
  4. 4.
    A. L. FeiId Jr., R. L. Ammon, A. I. Lewis, and L. S. Richardson, “Fabrication and Properties of Tantalum Base Alloys”, Metallurgical Society Conferences, Volume 18, High Temperature Materials II (Edited by G. M. Ault, W. F. Barclay, and H. P. Munger) pp 139–160.Google Scholar
  5. 5.
    R. L. Ammon and R. T. Begley, “Pilot Production and Evaluation of Tantalum Alloy Sheet”, Summary Phase Report, WANL-PR-M-004, June 15, 1963.Google Scholar
  6. 6.
    L. L. Seigle, “Structural Considerations in Developing Refractory Metal Alloys”, The Science and Technology of Selected Refractory Metals (Edited by N. E. Promisel), AGARD Conf. on Refractory Metals Held in Oslo, Norway, June 23–26, 1963, pp 63–93.Google Scholar
  7. 7.
    L. H. Amra and G. D. Oxx Jr., “Tantalum Base Alloys with High Strength Above 3000°F”, Metallurgical Society Conferences, Volume 34, High Temperature Refractory Metals, Part II (Edited by R. W. Fountain, J. Maltz, L. S. Richardson).Google Scholar
  8. 8.
    R. W. Buckman Jr. and R. C. Goodspeed, “Development of Dispersion Strengthened Tantalum Base Alloy”, Seventh Quarterly Report, WANL-PR-(Q)-008, NASA-CR-54894.Google Scholar
  9. 9.
    R. W. Buckman, Jr. and R. C. Goodspeed, “Development of Dispersion Strengthened Tantalum Base Alloy”, Twelfth Quarterly Report, WANL-PR-(Q)-013, NASA-CR-72316.Google Scholar
  10. 10.
    R. A. Perkins and J. L. Lytton, “Effect of Processing Variables on the Structure and Properties of Refractory Metals”, Technical Report No. AFML-TR-65–234, Part I, July, 1965.Google Scholar
  11. 11.
    R. L Ammon and D. L. Harrod, “Strengthening Effects in Ta-W-Hf Alloys”, Presented at AIME Symposium on the Physical Metallurgy of Refractory Metals, French Lick, Indiana, October 3–5, 1965, To be Published.Google Scholar
  12. 12.
    R. L. Ammon and R. T. Begley, “Pilot Production and Evaluation of Tantalum Alloy Sheet”, Summary Phase Report, Part II, WANL-PR-M-009, July 1, 1964.Google Scholar
  13. 13.
    R. W. Buckman, Jr., “Development of Dispersion Strengthened Tantalum Base Alloy”, Fourth Quarterly Report, WANL-PR-(Q)-005, NASA-CR-54288.Google Scholar
  14. 14.
    R. W. Buckman, Jr. and R. T. Begley, “Development of Dispersion Strengthened Tantalum Base Alloy”, Third Quarterly Report, WANL-PR-(Q)-003, NASA-CR-54105.Google Scholar
  15. 15.
    H. Conrad, “Experimental Evaluation of Creep and Stress Rupture”, Mechanical Behavior of Materials at Elevated Temperatures, (Edited by J. E. Dorn) McGraw-Hill Book Co., 1961, pp 168–169.Google Scholar
  16. 16.
    H. Inouye, “The Contamination of Refractory Metals in Vacua Below 10-6 Torr”, Refractory Metals and Alloys III: Applied Aspects — Part II, (Edited by R. I. Jaffee) Metallurgical Society Conferences, Vol. 30, pp 871–883.Google Scholar
  17. 17.
    R. W. Buckman Jr., “Effect of Test Environment on the Mechanical Properties of Refractory Metal Alloys” Presented at 1967 Vacuum Metallurgy Conference, Barbizon Plaza Hotel, New York, N. Y., June 13–15, 1967, To be Published.Google Scholar
  18. 18.
    R.M. Bonesteel, J. L Lytton, D. J. Rowcliffe, and T. E. Tietz, “Recovery and Internal Oxidation of Columbium and Columbium Alloys”, AFML-TR-66–253, August, 1966.Google Scholar
  19. 19.
    F. F. Schmidt et al, “Investigation of the Properties of Tantalum and Its Alloys”, Battelle Memorial Institute, WADD-TR-59–13 (December 31, 1959).Google Scholar
  20. 20.
    R. L. Stephenson, “Creep-Rupture Properties of Unalloyed Tantalum, Ta-10%W and T-111 Alloys”, Oak Ridge National Laboratory, ORNL-TM-1994, December, 1967.Google Scholar
  21. 21.
    R. H. Titran and R. W. Hall, “Ultra High Vacuum Creep Behavior of Columbium and Tantalum Alloys at 2000°F and 2200°F for Times Greater than 1000 Hours”, NASA Technical Note, NASA-TND-3222, January, 1966.Google Scholar
  22. 22.
    R. W. Buckman, Jr., Unpublished Data. Astronuclear Laboratory.Google Scholar
  23. 23.
    J. C. Sawyer and E. A. Steigerwald, “Generation of Long Time Creep Data of Refractory Alloys at Elevated Temperatures”, Prepared for NASA by TRW, Inc. under Contract NAS 3–2545, ER-7203.Google Scholar
  24. 24.
    R. W. Buckman, Jr. and R. C. Goodspeed, “Development of Dispersion Strengthened Tantalum Base Alloy”, Thirteenth Quarterly Report, WANL-PR-(Q)-014, NASA-CR-72306.Google Scholar
  25. 25.
    R.W. Buckman, Jr., “Development of Dispersion Strengthened Tantalum Base Alloy”, Fifth Quarterly Report, WANL-PR-(Q)-006, NASA-CR-54462.Google Scholar
  26. 26.
    G. D. McAdam, “Substitutional Niobium Alloys of High Creep Strength”, J. Inst. of Metals, 93, 1964–65, pp 559–564.Google Scholar
  27. 27.
    O. D. Sherby, “Factors Affecting the High Temperature Strength of Polycrystalline Solids, “Acta Met, 10, 1962, pp 135–147.CrossRefGoogle Scholar
  28. 28.
    R. W. Buckman, Jr. and R. C. Goodspeed, “Development of Dispersion Strengthened Tantalum Base Alloy”, Tenth Quarterly Report, WANL-PR-(Q)-011, NASA-CR-72093.Google Scholar
  29. 29.
    W. H. Chang, “Strengthening of Refractory Metals”, Refractory Metals and Alloys, AIME Met. Soc. Conference, Volume 11, 1961, pp 83–117.Google Scholar
  30. 30.
    Anon, Columbium, Tantalum and Tungsten Alloys Technical Information, Vol. 3, Wah Chang, Albany, A Teledyne Co., Albany, Oregon, 1968.Google Scholar
  31. 31.
    Anon, Fansteel Product Bulletins.Google Scholar
  32. 32.
    M. L. Torti, Development of Tantalum-Tungsten Alloys for High Performance Propulsion System Components, Second Quarterly Report, Contract NOrd-18787.Google Scholar
  33. 33.
    M. L. Torti, “Physical Properties and Fabrication Techniques for the Tantalum 10% Tungsten Alloy”, High Temperature Materials II, Met. Soc. Conf. 18, pp 161–169.Google Scholar
  34. 34.
    G. G. Lessmann and D. R. Stoner, “Welding Refractory Metal Alloys for Space System Applications”, WANL-SP-009, November, 1965, Presented at 9th National SAMPE Symposium on Joining Materials for Aerospace Systems, November 15–17, 1965, Dayton, Ohio.Google Scholar
  35. 35.
    R. T. Begley and R. W. Buckman, Jr., “Tantalum Base Alloys for Space Nuclear Power Systems”, Presented at ASME Winter Annual Meeting, Pittsburgh, Pa., November 12–17, 1967. To be published.Google Scholar
  36. 36.
    J. R. Stefano and E. E. Hoffman, “Corrosion Mechanisms in Refractory Metal-Alkali Metal Systems, The Science and Technology of Tungsten, Tantalum, Molybdenum, Niobium and Their Alloys, AGARD Conference on Refractory Metals held at Oslo University Centre, Oslo-Blinderns, Norway, June 23–26, 1963, Edited by N. E. Promisel.Google Scholar
  37. 37.
    Anon, Space Power Systems Advanced Technology Conference, pp 169–200, NASA-SP-131, Lewis Research Center, Cleveland, Ohio, August 23–24, 1966.Google Scholar
  38. 38.
    P. L. Raffo and W. D. Klopp, “Mechanical Properties of Solid Solution and Carbide Strengthened Arc Melted Tungsten Alloys”, NASA Technical Note NASA-TN-D-3248, February, 1966.Google Scholar
  39. 39.
    L. S. Rubenstein, “Effects of Composition and Heat Treatment on High Temperature Strength of Arc Melted Tungsten-Hafnium-Carbon Alloys”, NASA Technical Note, NASA-TND-4379.Google Scholar
  40. 40.
    R. T. Begley, J. A. Cornie, and R. C. Goodspeed, “Development of Columbium Base Alloys”, AFML-TR-67–116, November, 1967.Google Scholar
  41. 41.
    F. F. Schmidt and H. R. Ogden/The Engineering Properties of Molybdenum and Molybdenum Base Alloys” DMIC Report 190, September 20, 1963.Google Scholar

Copyright information

© American Institute of Mining, Metallurgical, and Petrolium Engineers, Inc. 1968

Authors and Affiliations

  • R. W. BuckmanJr.
    • 1
  • R. C. Goodspeed
    • 1
  1. 1.Westinghouse Astronuclear LaboratoryPittsburghUSA

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