Abstract
This paper assesses the relative accuracy of a number of techniques that are capable of predicting a wide range of creep properties. The techniques studied in this paper include the 4-Θ, 6-θ, CRISPEN, Omega and CDM methodologies. The parameters of these models were estimated from short-term creep property data on 1CrMoV steel and these estimated models were then used to predict the known longer-term creep properties of this steel. It was found that the CDM approach yielded predicted times to failure that were wholly inadequate. The 6-θ approach was best for predicting long term times to failure. The best minimum creep rate predictions came from using either the 4-Θ, or the CRISPEN or the Omega technique. Finally, times to small strains were best predicted using the 6-θ and CRISPEN techniques.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
R. W. Evans, Mater. Sci. Techn. 5 (1989) 699.
Idem., ibid. 16 (2000) 6.
R. W. Evans and P. J. Scharning, ibid. 17 (2001) 487.
M. Evans, J. Mater. Sci. 35 (2000) 2937.
L. M. Kachanov, “The Theory of Creep” (National Lending Library, Boston Spa, UK, 1967).
Y. N. Rabotnow, “Creep Problems in Structural Members” (North Holland, Amsterdam, 1969).
A. M. Othman and D. R. Hayhurst, Int. J. Mech. Sci. 32(1) (1990) 35.
M. Prager, J. Press. Vess. Techn. 122 (2000) 273.
M. E. Keeble, “Investigation into the Accuracy and Applicability of the MPC Omega Method of Creep Life Prediction in Relation to Other Lifing Methods,” Thesis (M.Phil.), University of Wales Swansea, 1996.
J. C. Ion, A. Barbosa, M. F. Ashby, B. F. Dyson and M. Mclean, “The Modelling of Creep for Engineering Design,” I. NPL report DMA A115, 1986.
F. R. Larson and J. Miller, Trans. ASME 174(5) (1952) 765.
R. W. Evans, M. R. Willis, B. Wilshire, S. Holdsworth, B. Senior, A. Fleming, M. Spindler and J. A. Williams, in Proceedings of the 5th International Conference on “Creep and Fracture of Materials and Structures,” Swansea, 1993, edited by B. Wilshire and R. W. Evans (The Institute of Materials, London, 1993) p. 633.
R. W. Evans and B. Wilshire, “Creep of Metals and Alloys” (The Institute of Materials, London, 1985).
D. Wang and R. W. Evans, in “Uniaxial Creep Modelling by Continuum Damage Mechanics, CRISPEN and the Theta Projection Concept,” in “COMPASS” 1999, edited by W. J. Evans, R. W. Evans and M. Bache (Engineering Advisory Services Ltd., London, 1999).
R. W. Evans, Proc. R. Soc. Lond. A 456 (2000) 835.
M. Evans, J. Strain Anal. 37 (2002) 169.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Evans, M. A comparative assessment of creep property predictions for a 1CrMoV rotor steel using the CRISPEN, CDM, Omega and Theta projection techniques. Journal of Materials Science 39, 2053–2071 (2004). https://doi.org/10.1023/B:JMSC.0000017768.59276.3f
Issue Date:
DOI: https://doi.org/10.1023/B:JMSC.0000017768.59276.3f