Abstract
The creep of alpha iron of about 99·9% purity has been studied by means of the isothermal test technique in the temperature interval of 500–1170°K. At temperatures lower than 800°K the apparent activation energy of creep depends primarily on the stress, at temperatures higher than 800°K but lower than the Curie temperatureT c=1042°K it depends mainly on the temperature. At the Curie temperature the apparent activation energy reaches a value of about 175 kcal mol−1. The stress dependence of the minimum creep rate cannot be generally described either by a simple power function of the σn type, or by a simple function of the exp (βσ) type.
An analysis of the results obtained leads to the conclusion that the minimum creep rate is controlled by the gliding movement of dislocations dependent on lattice self-diffusion. The mechanism controlling the creep rate at temperatures above the Curie point needs further study.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Ishida Y., Cheng C. Y., Dorn J. E.: Trans. Met. Soc. AIME236 (1966), 964.
Dorn J. E., J. Mech. Phys. Solids3 (1955), 85.
Čadek J., Orlová A., Cíha K.: Kovové materiály5 (1967), 461.
Buffington F. S., Hirano K., Cohen M.: Acta Met.9 (1961), 434.
James D. W., Leak G. M.: Phil. Mag.14 (1966), 701.
Birchenall C. E., Mehl R. F.: Trans. Met. Soc. AIME188 (1950), 144.
Buffington F. S., Bakalar I. D., Cohen M.: The Physics of Powder Metallurgy, Chap. 6; ed. W. E. Kingston, McGraw-Hill Book Co., New York, (1951).
Golikov V. M., Borisov V. T.: Problemy metalovedenija i fiziki metallov, 4. Sb. trudov IMFM-CNIICM Metallurgizdat, Moscow (1955), 528.
Leymonie C., Lacombe P.: Rev. Met.6 (1958), 524.
Borg R. J., Birchenall C. E.: Trans. Met. Soc. AIME218 (1960), 980.
Graham D., Tomlin D. H.: Phil. Mag.8 (1965), 491.
Sherby O. D.: Acta Met.10 (1962), 135.
Barrett C. R., Ardell A. J., Sherby O. D.: Trans. Met. Soc. AIME230 (1964), 200.
Barrett C. R., Sherby O. D.: Trans. Met. Soc. AIME230 (1964), 1322.
Bonesteel R. M., Sherby O. D.: Acta Met.14 (1966), 385.
Koester W.: Zs. Metallkde39 (1948), 1.
Carvalhinhos H., Argent B. B.: J. Inst. Met.95 (1967), 364.
Raymond L., Dorn J. E.: Trans. Met. Soc. AIME230 (1964), 560.
Hirsch P. B., Warrington D. H.: Phil. Mag.6 (1961), 735.
Hirano K., Cohen M., Averbach B. L., Ujiiye N.: Trans. Met. Soc. AIME227 (1963), 950
McLean D., Hale K. F.: Structural Processes, in Creep, Ir. St. Inst. Spec. Rep. No. 70, (1961), 19.
Weertman J.: Trans, Met. Soc. AIME233 (1965), 2069.
Weertman J.: Acta Met.15 (1967), 1081.
Cottrell A. H.: Dislocations and Mechancial Properties of Crystals (Eds. Fisher J. C. et al.). J. Wiley, New York (1957), 509.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Čadek, J., Milička, K. The creep of alpha iron in the temperature range 220–900°C. Czech J Phys 18, 1156–1171 (1968). https://doi.org/10.1007/BF01690020
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF01690020