Surface microstructures and high-temperature high-pressure corrosion behavior of N18 zirconium alloy induced by high current pulsed electron beam irradiation

Study on microstructure and wear resistance of Zr-17Nb alloy irradiated by high current pulsed electron beam

“…According to the above study, phase transformation induced by HCPEB has a significant effect on the hardness and corrosion resistance of the alloy. Additionally, few literatures have reported on zirconium-based alloys rich in β-phase stable elements (such as Nb, and Hf elements) by HCPEB treatment [25]. Therefore, this paper investigates phase transitions and surface microstructure generated on Zr-17Nb alloy induced by HCPEB, as well as the effect of microstructure on wear resistance and hardness of alloy surface is also inspected under the action of HCPEB.…”

Study of the Application Efficiency of Irradiation with Heavy Ions to Increase the Helium Swelling Resistance of BeO Ceramics

“…By analyzing the obtained data on reduction of helium-swelling value and comparing them with the literature data [15][16][17]19,20] on other methods of modification and protection against helium embrittlement, the following conclusions can be drawn. As is known from References [15][16][17], one method of increasing swelling resistance and subsequent structure degradation is the method of high-precision pulsed irradiation with electrons and ions.…”

“…This hypothesis is based on the assumption that dislocation defects isolated from each other due to small fluences of irradiation with heavy ions will create additional obstacles to migrating helium ions, thereby preventing them from agglomeration into large gas-filled bubbles. The basis for this hypothesis was a number of experimental works [14][15][16][17][18][19][20] aimed at studying the applicability of ionizing radiation to increase the radiation resistance of materials, as well as studying the mechanisms of radiation hardening of the near-surface layer of ceramics, steels, and multilayer coatings. Therefore, for example, in a number of works, the effect of radiation hardening at irradiation with high-precision pulse beams of near-surface layers of refractory materials and ceramics is considered [14][15][16][17][18][19][20][21][22].…”

“…The basis for this hypothesis was a number of experimental works [14][15][16][17][18][19][20] aimed at studying the applicability of ionizing radiation to increase the radiation resistance of materials, as well as studying the mechanisms of radiation hardening of the near-surface layer of ceramics, steels, and multilayer coatings. Therefore, for example, in a number of works, the effect of radiation hardening at irradiation with high-precision pulse beams of near-surface layers of refractory materials and ceramics is considered [14][15][16][17][18][19][20][21][22]. The authors of these works call the main hardening mechanism changes in dislocation density and amorphization processes, followed by the formation of amorphous inclusions in the structure of the near-surface radiation-modified layer.…”

“…Thus, by analyzing the literature data of previously carried out experimental works [14][15][16][17][18][19][20][21][22][23][24][25], one can make an assumption about the possible positive effect of radiation hardening of the near-surface layers of irradiated materials that consists in changing the dislocation density and defect structure of the layer. These changes can play both a positive effect, initiating changes that contribute to an increase in degradation resistance of materials, and a negative effect, consisting in the creation of active defect regions, near which subsequent radiation-induced defects will agglomerate.…”