Conclusions
-
1.
The change in the structure of the boundaries of recrystallized austenite grains during heating and the development of breaks in the boundaries are due to annealing twins growing from the breaks in the boundaries or near them.
-
2.
Large numbers of annealing twins not connected with the boundaries of the matrix are observed in large grains. Their appearance is explained by the "explosive" kinetics of the breakup of boundaries. Such twins are unstable and disappear due to migration of noncoherent boundaries or breakup of low-mobility coherent twin boundaries.
-
3.
The formation of annealing twins should be regarded as an intermediate stage in the disappearance of intergranular boundaries and anomalous grain growth by union of grains in metals and alloys with low stacking fault energies. The total grain-boundary energy decreases as the result of this process.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
Literature cited
K. M. Zhak, Ya. V. Grechnyi, and É. N. Pogrebnoi, "Polygonized boundaries in Fe+3% Si," Izv. Vyssh. Uchebn. Zaved., Chern. Metall., No. 10, 105 (1968).
M. A. Krishtal, Yu. I. Davydov, and M. I. Lerner, "Mechanism of secondary recrystallization in powdered tungsten," in: Interaction between Dislocations and Impurity Atoms in Metals and Alloys [in Russian], Tula (1969), p. 256.
K. M. Zhak and É. N. Pogrebnoi, "Growth mechanism of silicon ferrite crystals," Metalloved. Term. Obrab. Met., No. 4, 17 (1974).
A. P. Gulyaev and R. P. Leshchinskaya, "Intercrystalline fracture of high-speed steel," Metalloved. Term. Obrab. Met., No. 9, 22 (1963).
S. V. Zagulyaeva and M. I. Vinogradov, "Austenite grain growth in structural steel," Metalloved. Term. Obrab. Met., No. 7, 2 (1971).
M. I. Vinogradov, I. Yu. Ul'yanina, and G. A. Faivilevich, "Mechanism of austenite grain growth in structural steel," Metalloved. Term. Obrab. Met., No. 1, 5 (1975).
M. Crabski and R. Korski, Phil. Mag.,22, No. 178, 707 (1970).
G. Kegg, C. Horton, and J. Silcock, Phil. Mag.,27, No. 5, 1041 (1973).
P. Pumphrey and H. Gleiter, Phil. Mag.,30, No. 3, 593 (1974).
S. S. Gorelik et al., "Nature of the apparent coalescence of grains," Fiz. Met. Metalloved.,37, No. 5, 990 (1974).
S. Dash and N. Brown, Acta Met.,11, No. 9, 1067 (1963).
J. C. M. Zi, J. Appl. Phys.,33, No. 10, 2958 (1962).
K. M. Zhak and É. N. Pogrebnoi, "Anomalous growth of ferrite in Fe+3% Si," in: Reports of the Scientific-Technical Seminar: Formation of the Structure of Steels and Alloys during Deformation and Heat Treatment [in Russian], Chelyabinsk (1972), p. 46.
R. Fullman and C. Fischer, J. Appl. Phys.,22, No. 11, 1350 (1951).
D. McLean, Grain Boundaries in Metals, Oxford Univ. Press, London (1957).
S. S. Gorelik et al., "Mechanism of formation and disappearance of twins during heating of a deformed nickel-chromium alloy," Izv. Vyssh. Uchebn. Zaved., Chern. Metall., No. 2, 105 (1960).
C. Irving, A. Miodownick, and I. Towner, J. Inst. Met.,93, No. 10 (1965).
Additional information
Deceased.
Dnepropetrovsk Metallurgical Institute. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 3, pp. 9–12, March, 1978.
Rights and permissions
About this article
Cite this article
Zhak, K.M., Kazimirova, I.E., Marek, I.M. et al. Role of annealing twins in austenite grain growth. Met Sci Heat Treat 20, 185–189 (1978). https://doi.org/10.1007/BF00777089
Issue Date:
DOI: https://doi.org/10.1007/BF00777089