Abstract
We report here the results of three series of replicated creep rupture experiments carried out on copper bicrystals. The intent of this study is to investigate the scatter in creep rupture times in order to determine whether creep rupture may be viewed as an essentially deterministic phenomenon or if it contains intrinsic probabilistic features. The use of bicrystals is advantageous in such an investigation, because they are much less sensitive to the effects of loading eccentricity than poly crystalline specimens. The results indicate that where failure is due to a mixed cavitation/ductile rupture mode, the scatter in the failure times may be accounted for entirely by the effects of random variations in the experimental conditions. However when the failure mode is essentially intergranular creep cavitation, the scatter in the failure times is substantially greater than can be explained by the effects of experimental variability. This leads to the conclusion that under these conditions, the creep rupture phenomenon contains intrinsic probabilistic features.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
E. Lister, R.R. Barr, J. Hacar, R.P. Harvey, and F. Tumey:Proc. Joint Conf. on High-Temperature Properties of Steels, Eastbourne, United Kingdom, British Iron and Steel Research Association and Iron and Steel Institute, 1966, pp. 47–60.
W. Rutman, M. Krause, and K.J. Kremer:Proc. Joint Conf. onHigh-Temperature Properties of Steels, Eastbourne, United Kingdom, British Iron and Steel Research Association and Iron and Steel Institute, 1966, pp. 23–29.
F. Garofalo, R.W. Whitmore, and W.F. Domis:Trans. AIME, 1961, vol. 21, pp. 310–19.
R.K. Penny, E.G. Ellison, and G.A. Webster:ASTM Mater. Res. Stand., 1966, vol. 6, pp. 76–88.
D.R. Hayhurst:Int. J. Mech. Sci., 1974, vol. 16, pp. 829–41.
R. Raj:Ada Metall., 1978, vol. 26, pp. 341–49.
D.G. Brandon:Acta Metall., 1966, vol. 14, pp. 1479–84.
G.L. Bleris, J.G. Antonopoulos, T. Karakostas, and P. Delavignette:Phys. Status Solidi A, 1981, vol. 67, pp. 249–57.
T. Watanabe:Metall. Trans. A, 1983, vol. 14A, pp. 531–45.
J. Don and S. Majumdar:Acta Metall., 1986, pp. 961–67.
J.F. Lawless:Statistical Models and Methods for Lifetime Data, John Wiley & Sons, New York, NY, 1982, pp. 142–43, 169–70.
H.J. Frost and M.F. Ashby:Deformation-Mechanism Maps: The Plasticity and Creep of Metals and Ceramics, Pergamon Press, Oxford, 1982, p. 21.
I. Elishakoff:Probabilistic Methods in the Theory of Structures, Wiley-Interscience, New York, NY, 1983, p. 83.
S.G. Lekhnitskii:Theory of Elasticity of an Anisotropie Elastic Body, Holden-Day, San Francisco, CA, 1963, pp. 90–92.
P.R. Paslay, C.H. Wells, and G.R. Leverant:J. Appl. Mech., 1970, vol. 37, pp. 759–64.
J.T. Boyle and J. Spence:Stress Analysis for Creep, Butterworth’s, London, 1983, pp. 21–23.
M. Maldini and V. Lupine:Scripta Metall., 1988, vol. 22, pp. 1737–41.
L.M. Kachanov:Izv. Akad. Nauk SSR, Otd. Tekh. Nauk, 1958, vol. 8, pp. 26–31.
S.J. Fariborz, D.G. Harlow, and T.J. Delph:Acta Metall., 1985, vol. 33, pp. 1–9.
S.J. Fariborz, D.G. Harlow, and T.J. Delph:Acta Metall., 1986, vol. 34, pp. 1433–41.
Author information
Authors and Affiliations
Additional information
Formerly with Lehigh University, Bethlehem, PA
Formerly with Lehigh University
Rights and permissions
About this article
Cite this article
Farris, J.P., Lee, J.D., Harlow, D.G. et al. On the scatter in creep rupture times. Metall Trans A 21, 345–352 (1990). https://doi.org/10.1007/BF02782414
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF02782414