The effect of image forces, due to /’ interfaces, upon dislocations in the  channels or the y’ precipitates of a super-alloy was investigated by means of anisotropic elasticity theory. At room temperature, the dislocations in  were attracted to the interfaces and those in ’ were repelled from the interfaces. These 2 effects favored crossing of the  /’ interfaces. At 1050C, the effects were reversed and could contribute to localization of the deformation into  channels. The results of the calculations agreed with the configurations that were observed by means of  in situ  transmission electron microscopy. It was concluded that the magnitudes of the image forces were comparable to those of other forces which acted on the dislocations. It was emphasized that the predicted image forces depended sensitively upon the Cijkl values that were assumed.

L.Priester, O.Khalfallah, A.Coujou: Materials Science Forum, 1996, 207-209, 673-6