The elastic interactions of some surface dislocation half-loops and angular dislocation configurations were investigated. By using a computer program which calculated the image stresses of a straight dislocation half-line in a half-space, and permitted the construction of the stress field of any dislocation loop configuration, the interaction energy of 2 surface half-loops was obtained. Upon changing the relative positions of the 2 half-loops, the sign of the interaction energy varied from minus to plus. In accord with this, the interaction force between the 2 half-loops changed from attractive to repulsive. The interaction forces which were exerted upon the threading segments were also estimated for 2 angular dislocations, and their effects upon Matthews-Blakeslee equilibrium were considered.

K.Shintani: Journal of Applied Physics, 1996, 79[1], 179-83