The Accumulation and Annealing of Radiation-Induced Defects and the Effect of Hydrogen on the Physicomechanical Properties of the V−4Ti−4Cr and V−10Ti−5Cr Vanadium-Based Alloys under Low-Temperature (at 77 K) Neutron Irradiation

The processes of the accumulation and annealing of radiation-induced defects that occur under low-temperature (at 77 K) irradiation (with an energy E > 0.1 MeV) of V−4Ti−4Cr and V−10Ti−5Cr bcc alloys both nonmodified and modified with hydrogen isotopes in a concentration of 200 ppm, as well as th...

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Published in:Physics of metals and metallography 2016-03, Vol.117 (3), p.299-306
Main Authors: Arbuzov, V. L., Goshchitskii, B. N., Sagaradze, V. V., Danilov, S. E., Zuev, Yu. N., Kar’kin, A. E., Parkhomenko, V. D., Kozlov, A. V., Chernov, V. M.
Format: Article
Language:English
Subjects:
Alloys
Annealing
Chemistry and Materials Science
Clusters
Defect annealing
Electric properties
Hydrogen
Irradiation
Materials Science
Metallic Materials
Radiation
Strength and Plasticity
Ultimate tensile strength
Vanadium
Vanadium base alloys
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Summary:The processes of the accumulation and annealing of radiation-induced defects that occur under low-temperature (at 77 K) irradiation (with an energy E > 0.1 MeV) of V−4Ti−4Cr and V−10Ti−5Cr bcc alloys both nonmodified and modified with hydrogen isotopes in a concentration of 200 ppm, as well as the effect of these processes on the physicomechanical properties of these alloys, have been studied. It has been found that the saturation of these alloys with hydrogen leads to slight changes in their strength and ductility characteristics. The irradiation of the alloys at the temperature of 77 K results in a substantial increase in their yield stress and ultimate strength, as well as a decrease in their ductility. In the course of the postradiation annealing of the alloys at a temperature of 130 K, the stage related to the migration of interstitial atoms is observed. At temperatures of 290–320 K, the recovery stage occurs due to the formation of vacancy clusters. The stage that occurs at a temperature of 470 K can be attributed to the formation of impurity-vacancy clusters. Possible mechanisms of the radiation-induced strengthening of the alloys during irradiation and subsequent annealing have been discussed.
ISSN:0031-918X
1555-6190
DOI:10.1134/S0031918X16030030