| Abstract: | Conclusion The dislocation structure and the microstructure of diffusion layers, which at the temperature of diffusion annealing represent a single-phase solid solution of boron in  -iron, are determined by the local boron concentration and by the cooling rate from the austenitic state. The high dislocation density in the layer, which is found independently of the cooling rate, testifies to the fact that diffusion of boron in iron is accompanied by the formation of a large number of dislocations. The presence of boron in the solution slows down their redistribution and annihilation in the porcess of high-temperature annealing.The distribution of microdistortions across the thickness of the layer is characterized by the existence of a maximum near the diffusion line; this is due to the high density of the randomly distributed dislocations on the boundary between the diffusion zone and iron.Tula Polytechnic Institute. Translated from Metallovedenie i Termicheskaya obrabotka Metallov, No. 1, pp. 20–23, January, 1988. |
