Abstract
The effect of microstructure, by varying cooling rate, and the independent influence of ferrite grain size, by varying annealing temperature, on intermediate temperature embrittlement of ferritic spheroidal graphite cast irons have been investigated. The intermediate temperature embrittlement of ferritic spheroidal graphite cast irons depends on the triaxial stress field around the graphite nodules and also depends on ferrite grain size. When the carbon content of ferritic spheroidal graphite cast irons is constant, the hydrostatic tensile stress does not change by varying microstructure. Therefore, intergranular fracture will exist when the ratio of the hydrostatic tensile stress to equivalent stress is larger than one (σ m /σ eq ¹). It can still be eliminated by decreasing the ferrite grain size.
Similar content being viewed by others
References
D. U. Fitzgeorge and J. A. Pope: British Shipbuilding Research Asso., Report 123, 1953.
O. Yanagisawa and T. S. Lui:Metall. Trans. A, 1985, vol. 16A pp. 667–73.
R. N. Wright and T. R. Farrell;AFS Trans., 1985, pp 853–66.
O. Yanagisawa and T. S. Lui: {jtIMONO}, {dy1980}, vol. {vn52}, no. {sn6}.
T. S. Lui:Proc. of the 2nd ROC-ROK Joint Workshop on Fracture of Metals, 1986, pp. 297–310.
C. G. Chao, T. S. Lui, and M. H. Hon:Metall. Trans. A, 1988, vol. 19A, pp. 1213–19.
R. Salzbrenner:Journal of Materials Science, 1987, vol. 22, pp. 2135–47.
U. F. Kocks and H. Chandra:Acta Metall., 1982, vol. 30, pp. 695–709.
Niels Hansen: Symposium on 50th Anniversary of the Introduction of Dislocation,Metall. Trans. A, 1985, vol. 16A, pp. 2167–90.
Ali S. Argon and Frank A. McClintock:Mechanical Behavior of Materials, Addison-Wesley Series in Metallurgy and Materials, 1966, pp. 549–52.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Chao, C.G., Lui, T.S. & Hon, M.H. The effect of microstructure of ferritic spheroidal graphite cast irons on intergranular fracture at intermediate temperatures. Metall Trans A 20, 431–436 (1989). https://doi.org/10.1007/BF02653922
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF02653922