Studies of the changes in the geometry of grain boundaries and grains during recovery/continuous recrystallization in α-Fe
Samples of α-Fe (Armco) have been deformed by 50% in compression. These have then been annealed at 400 °C, considerably below the conventional recrystallization temperature, and the evolution of grain size and shape quantified. Initially the grain size is found to decrease whilst, at the same time, the grain-shape anisotropy also decreases. It is suggested that a continuous recrystallization process which favours the generation of higher angle grain boundaries is the underlying mechanism. Annealing for longer times gives rise to an increase in grain size with the development of undulations on the grain surfaces. The mechanism suggested for this behaviour involves the annihilation of segments of sub-boundaries on to a pre-existing boundary from either side of the boundary.
KeywordsPolymer Grain Size Anisotropy Recrystallization Material Processing
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- 1.F. N. Rhines, “Microstructology, Behavior and Microstructure of Materials” (Rieder Stuttgart, 1986).Google Scholar
- 2.B. Ralph, C. Barlow, B. Cooke and A. Porter, in “1st Risø International Symposium on Metallurgy and Materials Science”, edited by N. Hansen, A. R. Jones and T. Leffers (Risø press, Roskilde, Denmark, 1980) p. 229.Google Scholar
- 8.J. E. Bailey and P. B. Hirsch, Proc. Roy. Soc. A267 (1962) 11.Google Scholar