Lattice image simulations of high-resolution electron microscopic images of partial dislocations were performed for conditions under which the electron beam was normal to the stacking fault plane. It was shown that the positions of partial dislocations could be determined by differences between the faulted and unfaulted regions of the lattice image. The existence of kinks could therefore be resolved under suitable conditions. Image simulations were also performed for reconstructed 90 and 30 partial dislocations. The results showed that reconstruction could be detected, via high-resolution electron microscopy, in the case of the 30 partial but not in the case of the 90 partial. High-resolution electron microscopic experiments on dislocations which had been introduced by plastic deformation revealed that the positions of partial dislocations could be determined by using thin samples. Also, 30 and 90 partials were easily distinguished. High-density kinks were observed, but it was concluded that these were produced by electron irradiation during observation. No evidence was found for the reconstruction of 30 partial dislocations.

K.Suzuki, N.Maeda, S.Takeuchi: Philosophical Magazine A, 1996, 73[2], 431-41