Abstract
Deformation of austenite containing 0.85 pct C is shown to significantly increase the ten-sile strength of bainite formed during subsequent transformation. Quantitative metallo-graphic measurements indicate that strengthening is due primarily to an increased dislo-cation density in the ferrite and reduced carbide size, with consequent finer distribution, compared with the bainite formed from undeformed austenite. It is also shown that de-formed austenite transforms to upper bainite at temperatures at least as low as 200°C due to enhanced nucleation and/or growth at slip band heterogeneities generated by the defor-mation process while the only effect on the formation of lower bainite is a retardation of the transformation and reduction of ferrite plate size.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
R. F. Harvey:Iron Age, 1951, vol. 168, p. 70.
R. M. H. Lipps and H. van Zuilen:Metal Progr., 1954, vol. 66, p. 103.
J. W. Christian:Theory of Transformations in Metals and Alloys, p. 675, Pergamon Press, London, 1965.
A. B. Greninger and A. R. Troiano:Trans. AIME, 1940, vol. 140, p. 307.
G. V. Smith and R. F. Mehl:Trans. AIME, 1942, vol. 150, p. 211.
J. S. Bowles and N. F. Kennon:J. Aust. Inst. Metals, 1960, vol. 5, p. 106.
G. R. Srinivasan and C. M. Wayman:Acta Met, 1968, vol. 16, p. 609.
G. R. Speich:The Decomposition of Austenite by Diffusional Processes, p. 361, Interscience, New York, 1962.
J. J. Irani: British Iron and Steel Research Association Report No. MG/A/60/67, B.I.S.R.A., London, 1967.
M. D. Jepson and F. C. Thompson:J. Iron Steel Inst., 1949, vol. 162, p. 49.
S.Bhattacharyya and G. L. Kehl:Trans. ASM, 1954, vol. 47, p. 267.
R. H. Edwards and N. F. Kennon:J. Aust. Inst. Metals, 1974, vol. 19, p. 45.
D. Kalish, S. A. Kulin, and M. Cohen:J. Metals, 1965, vol. 17, p. 157.
R. Freiwillig, J. Kudrman, and P. Chraska:Met. Trans. A, 1976, vol. 7A, p. 1091.
M. E. Bush and P. M.Kelly:Acta Met, 1971, vol. 19, p. 1363.
F. B. Pickering:Transformation and Hardenability in Steels, p. 109, Climax Molybdenum Co., Chicago, 1967.
E. E. Underwood: Quantitative Stereology, p. 27, Addison-Wesley, Mass., 1970.
R. L. Fullman:Trans. AIME, 1953, vol. 197, p. 447.
W. E. Duckworth:Metals Mater, 1968, vol. 2, p. 343. 20. J. J. Irani and J. K. Mukherjee: British Iron and Steel Research Association Report MG/E/57/66, B.I.S.R.A., London, 1966.
J. M. Wheatley and R. G. Baker:Brit. Weld J., 1963, vol. 10, p. 23.
J. J. Irani and J. K. Mukherjee: British Iron and Steel Research Association Report MG/E/57/66, B.I.S.R.A., London, 1966.
R. Le Houllier, G. Begin, and A. Dube:Met. Trans., 1971, vol. 2, p. 2645.
J. C. Fisher:Acta Met., 1953, vol. l,p. 32.
D. J. Schmatz and V. F.Zackay:Trans. ASM, 1959, vol. 51, p. 476.
D. J. Schmatz, J. C. Shyne, and V. F. Zackay:Metal Progr., 1959, vol. 76, p. 66.
E. B. Kula and J. M. Dhosi:Trans. ASM, 1960, vol. 52, p. 321.
R. A. Grange and J. B. Mitchell:Metal Eng. Quart., 1961, vol. 1, p. 41.
K. J. Irvine, F. B. Pickering, and J. Garstone:J. Iron Steel Inst., 1960, vol. 196, p. 66.
L. Raymond, N. W. Gerberich, and C. F. Martin:J. Iron Steel Inst., 1965, vol. 203, p. 933.
P. R. Swann:Electron Microscopy and Strength of Crystals, p. 131, John Wiley and Sons, New York, 1963. $
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Edwards, R.H., Kennon, N.F. The Morphology and Mechanical Properties of Bainite Formed from Deformed Austenite. Metall Trans A 9, 1801–1809 (1978). https://doi.org/10.1007/BF02663411
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF02663411