THE Influence oF Cold-Deformation on The Diffusion and Solubility of Interstitial Impurities (H,C) in Metals (a-Fe,Ni) and Alloys (STEELS)
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Date
1986-06
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Addis Ababa University
Abstract
The problem of impurity diffusion accompanied with
segregation phase nucleation on dislocations has been considered
using the approximation of the local equilibrium
with respect to the impurity distribution between the matrix
solution and the near-dislocation regions. It has been
shown that the known experimental data on diffusion and
solubility of interstitial impurities (C.~I •.•• etc.) in
sorim metals (a-Fe;' Nil and alloys [Fe-3.5% Si, Fe-0.16%C
[steel)) are :described in the frame vlOrk of the dislocation
trap \Oodel, the only case where some segregation phases
with negligible diffusion conductivity and high capture
~bility for impurities in the near-dislocation regions
are nucleated. The characteristics of the segregation
phase regions near-dislocations have been obtained from
the treatment of the diffusion and solubility data. On
the basis of the crystallographic and thennodynamic considerations
it has besn shown that the existence of such
~egregation phase regions along dislocation in the systems
. in question is possible
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The Diffusion and Solubility