Abstract
Abstract An investigation of the results of diffusion of boron in low-carbon (30 ppm C) iron with the application of a high-sensitivity method of track autoradiography on polymetric detectors was conducted. It is shown that the diffusive boron mass-transport in body-centred cubic iron is carried by vacancy diffusion, and in face-centred cubic iron—by interstitial diffusion. The diffusion of boron in iron is accompanied by formation of a high density of dislocations, and distribution of boron in the diffusion layer is characterized by the presence of the “concentrational step” on the boundary between the two solid solutions with different dislocation density. The solubility of boron in low-dislocation density iron is very small and its temperature dependence is slight.
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