Analytical expressions for steady-state component profiles of irradiated substitutional alloys near point defect sinks

• Published in: Journal of nuclear materials Vol. 186; no. 3; pp. 269 - 276
• Main Authors: Pechenkin, V.A., Epov, G.A.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.02.1992; Elsevier
• Subjects: Applied sciences; Condensed matter: structure, mechanical and thermal properties; Exact sciences and technology; Metals. Metallurgy; Neutron radiation effects; Physical radiation effects, radiation damage; Physics; Structure of solids and liquids; crystallography; Ion irradiation; Ternary system; Transition metal Alloys; Segregation; Irradiation defect; Point defect; Analytical method; Theoretical study; Iron Chromium Nickel Alloys; Neutron irradiation; Iron alloy; Concentration distribution
• ISSN: 0022-3115; 1873-4820
• DOI: 10.1016/0022-3115(92)90346-M

The method of calculation of alloy concentration profiles near point defect sinks is suggested for homogeneously irradiated dilute binary and concentrated ternary alloys. Analytical expressions for spatial redistribution of alloy components near voids, foil surfaces, motionless dislocations and grain boundaries are derived. These expressions are in qualitative agreement with numerical calculations of the set of diffusion equations and with available experimental data for irradiated Fe-Cr-Ni alloys. It is shown, that the slowest component only is to be accumulated at the sinks, but the other two must migrate away from the sinks in pure substitutional ternary alloys with vacancy mechanism of radiation-induced segregation.