Abstract
A microduplex stainless steel (25.7 wt% Cr-6.6 wt% Ni) was investigated to examine grain growth during static annealing and superplastic deformation at 1000° C. The grain size at a constant strain rate of 1×10−4 sec−1 increases according to d∼8t 0.49 where d is the grain size and t is the time (in min) involved in deformation. Under the present test condition, the contribution of both static (time, t S) and dynamic (strain, ε) annealing appear to be significant and can be expressed by d∞ 0.19ε0.29. While the exponent of the first term is constant, the exponent of the second term may depend on the strain rate. Strain rate sensitivities were evaluated from differential strain rate tests for different initial grain sizes. Both strain rate sensitivity and grain size were noticed to increase with deformation.
Similar content being viewed by others
References
E. Hornbogen and U. Koster, in “Recrystallization of Metallic Materials”, edited by F. Haessner (Dr. Riederer Verlag GmbH, Stuttgart, 1978) p. 159.
G. K. Maltseva, V. I. Puzakov, S. V. Zemski and V. A. Karpelev, Izv. Vyssh. Uchebn. Zaved. Tsvetn. Metall. 3 (1980) 1007.
M. A. Clark and T. H. Alden, Acta Metall. 21 (1973) 1195.
R. Z. Valiyev and O. Z. Kaybyshev, Fiz. Metal. Metalloved. 41 (1976) 382.
G. Rai and N. J. Grant, Met. Trans. 6A (1975) 385.
H. W. Hayden, S. Floreen and P. D. Goodell, ibid. 3 (1972) 833.
C. I. Smith, B. Norgate and N. Ridley, Met. Sci. 10 (1976) 182.
W. A. Backofen, I. R. Turner and D. H. Avery, Trans. Q. Asm 57 (1964) 980.
R. J. Lindinger, R. C. Gibson and J. H. Brophy, ibid. 62 (1969) 230.
F. Haessner and S. Hofmann, in “Recrystallization of Metallic Materials”, edited by F. Haessner (Dr. Riederer Verlag GmbH, Stuttgart, 1978) p. 63.
O. A. Kaybyshev, I. V. Kazachkov and V. M. Rozenberg, Fiz. Metal. Metalloved. 36 (1973) 1235.
A. K. Ghosh, in “Deformation of Polycrystals: Mechanisms and Microstructures” (2nd RISø International Symposium on Metallurgy and Materials Science, 1981) p. 277.
A. K. Koul and F. B. Pickering, Acta Metall. 30 (1982) 1303.
A. K. Ghosh and C. H. Hamilton, Met. Trans. 10A (1979) 699.
B. P. Kashyap and A. K. Mukherjee, submitted for publication.
C. H. Hamilton and A. K. Ghosh, in “Titanium '80 Science and Technology” (Proceedings, 4th International Conference on Titanium, Kyoto, Japan) (The Metallurgical Society of AIME, Warrendale, PA, 1980) p. 1001.
N. E. Paton and C. H. Hamilton, Met. Trans. 10A (1979) 241.
J. W. Edington, K. N. Melton and C. P. Cutler, Prog. Mater. Sci. 21 (1976) 61.
B. P. Kashyap and G. S. Murty, Met. Trans. 13A (1982) 53.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Kashyap, B.P., Mukherjee, A.K. Investigation on grain growth and strain rate sensitivity of a superplastic microduplex steel at 1000°C. J Mater Sci 18, 3299–3304 (1983). https://doi.org/10.1007/BF00544154
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF00544154