2018 Volume 59 Issue 8 Pages 1244-1250
The recrystallization behavior of pure iron powder cores during the annealing process is visualized as Grain Orientation Spread (GOS) maps with an SEM/EBSD analysis. It is found to be significantly heterogeneous, leading to a heterogeneous dislocation density distribution. Nevertheless, a conventional dislocation pinning model well describes the coercive force behavior if the average dislocation density is applied. The pinning model is modified to separate the influence of the grain boundary pinning, and the relationship between the coercive force and the microstructure is discussed comprehensively.
This Paper was Originally Published in Japanese in J. Jpn Soc. Powder Powder Metallurgy 64 (2017) 428–435. In order to more precisely explain the relationship between annealing temperature and area fraction of recrystallized grain, Fig. 11 was changed.
