EBSD Characterization of Pure Iron Deformed by ECAE
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Polycrystalline iron was deformed by eight ECAE passes using the route Bc to a total strain of 9.2. After deformation the material was annealed at temperatures up to 800°C. Scanning electron microscopy (SEM) and high-resolution electron backscatter diffraction (EBSD) were used to characterize both deformed and annealed structures. In the as-deformed state, the mean grain size is 650 nm and the volume fraction of high angle boundaries (VHAB) is 56%. Upon annealing there is a pronounced softening above 300°C. At the beginning of recrystallization, at about 400°C, the V HAB increases to 71%. The results indicate that discontinuous recrystallization is the main softening mechanism in severely deformed iron. © (2010) Trans Tech Publications.
author list (cited authors)
Renzetti, R. A., Sandim, M., Sandim, H., Hartwig, K. T., Bernardi, H. H., & Raabe, D.