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V. L. Arbuzov, V. I. Bobrovskii, S. E. Danilov, V. V. Sagaradze

RESISTANCE-MEASUREMENT STUDIES OF THE PECULIARITIES OF THE STRUCTURAL STATE OF CHROMIUM-NICKEL-MOLYBDENUM AUSTENITIC REACTOR STEELS DOPED WITH TITANIUM AND PHOSPHORUS

Understanding of the mechanisms of radiation-induced phenomena is of fundamental value both for design of new steels and for improvement of the properties of the existing ones. Along with the crystal structure and chemical composition of the matrix, doping admixtures and the material microstructure play important role in these phenomena. In this paper, the peculiarities of the microstructural state of chromium-nickel-molybdenum austenitic steels doped with titanium and phosphorus are studied by means of resistance measurements. The existence of the synergetic effects of simultaneous doping of steels with titanium and phosphorus has been confirmed. The effect of solid solution segregation as the annealing temperature reaches 700–800 K, accompanied by increasing electric resistivity, and has been found. The energies of the migration of interstitial atoms and of the dissociation of the “interstitial site – titanium atom” pair have been determined. The phenomena observed are in agreement with the results obtained for other austenitic steels.

Acknowledgements: The research was carried out at IMP Neutron Material Science Complex and supported by grant # 15-17-2-3 of the Program of Fundamental Researches of UB RAS.

Keywords: austenitic reactor steels, segregation, intermetallics, doping, electrical resistance

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Founder:  Institute of Engineering Science, Russian Academy of Sciences (Ural Branch)
Chief Editor:  S.V. Smirnov
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