SEDL / STP / STP1325-EB / STP13908S

Effect of Radiation-Induced Segregation on Precipitate Stability and Swelling in Irradiated Alloys

Pechenkin, VA
Head of Laboratory, Junior Scientist, Engineer and Head of Division, State Scientific Center of Russian Federation, Institute of Physics & Power Engineering, Obninsk,Kaluga region

Epov, GA
Head of Laboratory, Junior Scientist, Engineer and Head of Division, State Scientific Center of Russian Federation, Institute of Physics & Power Engineering, Obninsk,Kaluga region

Stepanov, IA
Head of Laboratory, Junior Scientist, Engineer and Head of Division, State Scientific Center of Russian Federation, Institute of Physics & Power Engineering, Obninsk,Kaluga region

Konobeev, YV
Head of Laboratory, Junior Scientist, Engineer and Head of Division, State Scientific Center of Russian Federation, Institute of Physics & Power Engineering, Obninsk,Kaluga region

Pages: 16    Published: Jan 1999

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Source: STP1325-EB

Abstract

The radiation-induced segregation of alloy components near point defect sinks with a particular attention to Fe-Cr-Ni based alloys is analyzed. The influence of point defect generation rate on temperature ranges of stability for radiation-retarded M²³C⁶ and radiation-induced Ni³Si precipitates in austenitic stainless steels is considered. A method of calculation of steady-state segregation-induced bias in irradiated binary alloys, taking into account Kirkendall forces and drift forces caused by point defect migration and formation energy gradients near sinks, is proposed. Contributions of various forces to the bias in Fe-Cr-Ni and V-Fe alloys are evaluated. The effect of void-precipitate association on swelling is analyzed. The radiation-induced segregation of components and segregation-induced bias for motionless and moving grain boundaries in a Fe-Cr-Ni alloy are calculated by solving the set of coupled diffusion equations for component and point defect concentrations.

Keywords:
irradiation, alloy, radiation-induced segregation, precipitate, bias, void swelling, grain boundary

Paper ID: STP13908S
Committee/Subcommittee: E10.07
DOI: 10.1520/STP13908S
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