Abstract
The effect of warm rolling on upper bainitic structures is to promote the development of a spherodized carbide structure and a clearly defined dislocation substructure. An investigation of the mechanical properties of as transformed and warm rolled structures in SAE 4340 steel revealed that the microstructural changes result in an increase in the strain to fracture and in fracture toughness for the plate thickness studied in this work. These factors are related using a simple model based on the critical strain to fracture. The detailed microstructural features are incorporated by examining the strain to cause void nucleation and growth at carbide particles in terms of their size shape and volume fraction.
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K. J. Irvine and F. B. Pickering:J.I.S.I., 1963, vol. 201, p. 518
R. T. Ault, K. 0. McDowell, P. L. Hendricks, and T. M. F. Ronald:Trans. ASM, 1967, vol. 60, p. 70.
M. F. Ashby:Strengthening Mechanisms in Crystals, Kelly and Nicholson, Eds., p. 137, Elsevier Press, 1971.
P. M. Kelly and J. Nutting:J.I.S.I., 1961, vol. 197, p. 199.
J. M. Oblak and R. F. Heheman:Transformation and Hardenability in Steel, p. 15, Climax Molybdenum Corporation Symposium, 1967.
ASTM:Plain Strain Fracture Toughness of Metallic Materials, E399-72T, ASTM, 1970.
G. R. Irwin:Trans. ASME, 1960, vol. D82, p. 417.
J. Barsom and S. Rolfe:Eng. Fract. Mech., 1971, vol. 2, p. 341.
G. T. Hahn and A. R. Rosenfield:Applications Related Phenomena in Titanium and Its Alloys, ASTM Symposium, 1967.
R. G. Hoagland, A. R. Rosenfield, and G. T. Hahn:Met. Trans., 1972, vol. 3, p. 123.
J. Malkin and A. S. Tetelman:Eng. Frac. Mech., 1971, vol. 3, p. 151.
J. Krafft:Appl. Mater. Res., 1964, vol. 3, p. 88.
J. R. Rice and M. A. Johnson:Inelastic Behavior of Solids, Kanninen, Adler, Rosenfield, and Jaffee, Eds., 641, McGraw Hill New York, 1970.
F. A. McClintock:Physics of Strength and Plasticity, M.I.T. Press, 1969.
D. P. Clausing:Int. Fract. Mech., 1970, vol. 6, p. 71.
J. R. Rice and G. F. Rosengren:J. Mech. Phys. Solids, 1968, vol. 16, p. 1012.
T. R. Wilshaw:J.I.S.I., 1966, vol. 204, p. 936.
W. W. Gerberich and P. L. Hemmings:Trans. ASM, 1969, vol. 62, p. 540.
A. R. Rosenfield, G. T. Hahn, and J. D. Embury:Met. Trans., 1972, vol. 3, p. 2797.
R. P. Wei:Fracture Toughness Testing and Its Applications, p. 279, ASTM, STP381, 1964.
J. Dvorak:Proceedings of Second International Conference on Fracture, p. 338, Chapman and Hall, 1969.
J. C. Fisher, E. W. Hart, and R. H. Pry:Acta. Met., 1953, vol. 1, p. 336.
D. V. Wilson and Y. A. Koonan:Acta. Met., 1964, vol. 12, p. 617.
L. M. Brown and W. Stobbs:Phil. Mag., 1971, vol. 23, p. 1201.
F. A. McClintock:Ductility, p. 235, ASM, 1967.
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Osborne, D.E., Embury, J.D. The influence of warm rolling on the fracture toughness of bainitic steels. Metall Trans 4, 2051–2061 (1973). https://doi.org/10.1007/BF02643267
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DOI: https://doi.org/10.1007/BF02643267