Journal of Materials Science

, Volume 20, Issue 4, pp 1201–1206 | Cite as

Effect of triaxial stress-state on creep fracture in Inconel alloy X-750

  • M. C. Pandey
  • A. K. Mukherjee
  • D. M. R. Taplin


Smooth specimens and circumferentially notched bars with a “Bridgman” notch geometry were tested uniaxially at 700° C in air in the stress range of 340 to 700 MPa. The results indicated that the material was notch strengthened on the basis of net section stress,σa. However, when the fracture lifetimes were plotted as a function of the Bridgman effective stress,σe, all the data points fell approximately on one line. Cavity nucleation sites changed systematically from notch throat at the highest stress to notch root at the low stress. The notch rupture ductility in the notched specimens were found to have a lower value than in the smooth ones at all stresses.


Ductility High Stress Effective Stress Nucleation Site Stress Range 
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  1. 1.
    D. Mclean, B. F. Dyson andD. M. R. Taplin, “The prediction of Creep Fracture in Engineering Alloys”, The Fourth International Conference on Fracture, Vol. 1, edited by D. M. R. Taplin (University of Waterloo Press, Waterloo, Canada, 1977) pp. 325–62.Google Scholar
  2. 2.
    S. Taira andR. Ohtani, “Advances in Creep Design”, edited by A. I. Smith and A. M. Nicholson, (Applied Science Publishers, London, 1971) p. 329.Google Scholar
  3. 3.
    A. E. Johnson, J. Henderson andB. Khan, “Complex stress creep, Relaxation and Fracture of Metallic Alloys”, (HMSO, Edinburgh, 1962).Google Scholar
  4. 4.
    B. F. Dyson andD. Mclean,Metal Sci. 11 (1977) 37.Google Scholar
  5. 5.
    D. Kelly,Acta Metall. 23 (1975) 1267.Google Scholar
  6. 6.
    M. S. Loveday andB. F. Dyson, “Mechanical Behaviour of Materials”, edited by K. J. Miller and R. F. Smith, ICM3, Vol. 2 (Pergamon, Oxford, 1980) pp. 213–22.Google Scholar
  7. 7.
    B. F. Dyson andM. S. Loveday, Proceedings of IUTAM Conference on Creep Structures, Leicester, September (1980).Google Scholar
  8. 8.
    S. E. Ng, G. A. Webster andB. F. Dyson, “Notch Weakening and Strengthening in Creep of 1/2 Cr 1/2 Mo 1/4 steel.” Advances in Fracture Research, ICF5, Canes, France, Vol. 3 (Pergamon, Oxford, 1981) pp. 1275–83.Google Scholar
  9. 9.
    W. F. Brown, Jr, M. H. Jones andD. P. Newman, Symposium on Strength and Ductility of Metals at Elevated Temperature with Particular References to Notches and Metallurgical Changes, ASTM STP 128 (1952) pp. 25–45.Google Scholar
  10. 10.
    E. A. Davis andJ. J. Manjoine,ASTM STP 128 (1952) 67.Google Scholar
  11. 11.
    R. M. Goldhoff andM. J. Beattie, Jr,Trans. ASM 57 (1964) 494.Google Scholar
  12. 12.
    R. M. Goldhoff andA. J. Brothers,Trans. ASME J. Basic Engineering 90 (1968) 37.Google Scholar
  13. 13.
    F. Garafalo,ASTM 59 (1959) 957.Google Scholar
  14. 14.
    D. R. Hayhurst, F. A. Leckie andJ. T. Henderson,Int. J. Mech. Sci. 19 (1977) 147.Google Scholar
  15. 15.
    D. R. Hayhurst andJ. T. Henderson,Int. J. Mech. Sci. 19 (1977) 133.Google Scholar
  16. 16.
    Inconel alloy X-750, Huntinton Alloys, The International Nickel Company, Inc., West Virginia (1963).Google Scholar
  17. 17.
    P. W. Bridgman, “Large Plastic Flow and Fracture”, (McGraw Hill, New York, 1952).Google Scholar
  18. 18.
    M. C. Pandey, D. M. R. Taplin andA. K. Mukherjee,Met. Trans. 15A (1984) 1763.Google Scholar
  19. 19.
    M. C. Pandey, B. F. Dyson andD. M. R. Taplin,Proc. Roy Soc. A 393 (1984) 117.Google Scholar
  20. 20.
    M. C. Pandey, Ph D thesis, University of Waterloo, Canada (1982).Google Scholar

Copyright information

© Chapman and Hall Ltd. 1985

Authors and Affiliations

  • M. C. Pandey
    • 1
  • A. K. Mukherjee
    • 1
  • D. M. R. Taplin
    • 2
  1. 1.Division of Materials Science and Engineering Department of Mechanical EngineeringUniversity of CaliforniaDavisUSA
  2. 2.Department of Mechanical and Manufacturing Engineering, Trinity CollegeUniversity of DublinDublin-2Ireland

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