Abstract
A fine microstructure has been developed in a Fe-10Al-1.9C material made from rapidly solidified powders. The compacted material had a microstructure containing about 50 vol% kappa phase (Fe3AlCx) and 50 vol% alpha phase. The creep behaviour of the material was investigated using tension and compression change in strain rate tests and elongation to failure tests. Stress exponents of 2–3 were obtained over a wide range of strain rates, and an average activation energy for creep of 245 kJ mol−1 was determined. A maximum elongation to failure of 1120% was obtained at 900°C. The tensile ductility as a function of strain rate was found to follow the same behaviour of other ceramic materials wherein the elongation to failure decreases sharply with an increase in strain rate.
Similar content being viewed by others
References
O. D. Sherby, T. Oyama, D. W. Kum, B. Walser and J. Wadsworth, J. Metals 37 (1985) 50.
O. A. Ruano, L. E. Eiselstein and O. D. Sherby, Metall. Trans. 13A (1982) 355.
K. Lohberg and W. Schmidt, Arch. Eisen. 11 (1937) 607.
A. Ball and M. M. Hutchinson, Metal Sci. J. 3 (1969) 1.
K. A. Padmanabhan and G. J. Davies, “Superplasticity” (MREZ, Springer, Berlin, 1980).
O. D. Sherby and J. Wadsworth, “Deformation, Processing, and Structures”, edited by G. Krauss (ASM, Metals Park, OH, 1984) p. 355.
O. Oikawa, Tech. Rep. Tohoku Univ. 48 (1983) 9.
W. Koster, Z. Metall. 39 (1948) 1.
W. J. Kim, J. Wolfenstine, O. A. Ruano, G. Frommeyer and O. D. Sherby, Metall. Trans. 23A (1992) 527.
S. Sagat and D. M. R. Taplin, Metal. Sci. 10 (1976) 94.
J. Pilling and N. Ridley, in “Superplasticity in Aerospace”, edited by H. C. Heikkenen and T. R. McNelley (The Metallurgical Society, Warrendale, PA 1988) p. 183.
O. D. Sherby and J. Wadsworth, Progr. Mater. Sci. 33 (1989) 169.
W. J. Kim, J. Wolfenstine and O. D. Sherby, Acta Metall. Mater. 39 (1991) 199.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Teo, C.K., Ruano, O.A., Wadsworth, J. et al. Superplastic behaviour of a ceramic-based kappa/alpha Fe-10Al-1.9C material. JOURNAL OF MATERIALS SCIENCE 29, 6581–6586 (1994). https://doi.org/10.1007/BF00354024
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/BF00354024