Recoil energy dependence of primary radiation damage in tungsten from cascade overlap with voids

Fellman, A.; Sand, Andrea E.

doi:10.1016/j.jnucmat.2022.154020

Cited by 3 publications

(1 citation statement)

References 37 publications

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“…According to the presented simulation results, it can be seen that the main changes in the structure were observed only when the maximum range of ions was reached, which was characterized by the dominance of ionization losses associated with the interaction of ions with the nuclear subsystem. At the same time, these shifts were most pronounced only in the case of reaching the maximum irradiation fluences of 10 14 -10 15 ion/cm 2 , which, according to a number of literature data, were characteristic of the effect of deep overlapping of defective regions formed during irradiation [32,33]. The results of the dependence of the irradiation fluence and the accumulated atomic displacements obtained from the calculated data of ionization losses are presented in Figure 3.…”

Section: Experimental Methodsmentioning

confidence: 58%

Study of the Radiation Damage Kinetics in NbTiVZr High-Entropy Alloys Irradiated by Heavy Ions

Kadyrzhanov

Kozlovskiy

Shlimas

et al. 2023

Metals

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The purpose of this paper was to study the kinetics of accumulation of radiation damage in the near-surface layer of a high-entropy NbTiVZr alloy upon irradiation with heavy Kr15+ ions and fluences of 1010–1015 ion/cm2. According to the data of X-ray diffraction analysis, it was found that irradiation with heavy ions lead to structural changes associated with the accumulation of deformation distortions and stresses. In this case, the nature of deformation distortions was associated with tensile distortions of the crystal lattice and swelling of the near-surface layer. An analysis of the strength properties of the irradiated samples showed that the accumulation of deformation distortions in the near-surface layer lead to a decrease in the resistance to cracking and destruction of the near-surface layer. In this case, the main changes occurred at fluences above 1013 ion/cm2, which are characterized by an excess of the threshold for overlapping defective regions that appear along the trajectory of incident ions. Tribological tests showed that an increase in defective inclusions in the structure of the near-surface layer lead to an increase in friction and a decrease in crack resistance.

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Section: Experimental Methodsmentioning

confidence: 58%

Study of the Radiation Damage Kinetics in NbTiVZr High-Entropy Alloys Irradiated by Heavy Ions

Kadyrzhanov

Kozlovskiy

Shlimas

et al. 2023

Metals

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Fast generation of reliable primary radiation damage of BCC tungsten by sampling molecular dynamics databases

Zhang

Zheng

et al. 2023

Nuclear Materials and Energy

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Cascade overlap simulation of formation of dislocation loops in Ti-V-Ta multi-principal element alloy

Zhao,

Dou,

et al. 2024

Acta Phys. Sin.

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Among the currently developed multi-principal element alloys (MPEAs), Ti-V-Ta MPEA stands out for its good high-temperature strength, good room-temperature plasticity, stable organizational structure, and low neutron activation, making it a prime candidate for cladding material in special power reactors. The radiation resistance of Ti-V-Ta MPEA is the focus of current research. Dislocation loops are the main irradiation defects in Ti-V-Ta MPEA, which can significantly affect the mechanical properties. Therefore, clarifying the formation mechanism of dislocation loops in Ti-V-Ta HEA can help understand its radiation resistance. The formation behavior of dislocation loops in Ti-V-Ta MPEA was studied based on molecular dynamics method. Cascade overlap simulations with vacancy clusters and interstitial clusters were carried out. The cascade overlap formation mechanism of dislocation loops was analyzed and discussed. In Ti-V-Ta MPEA, the cascade overlap with defect clusters can directly produce different types of dislocation structures. The defect configuration after cascade overlap is determined by the PKA energy and the type and size of the preset defect clusters. Cascade overlap can improve the formation probability of <100> dislocation loops in Ti-V-Ta MPEA. Cascade overlap with vacancy clusters is an important mechanism for the formation of <100> vacancy dislocation loops, and the size of vacancy clusters is the dominant factor for the formation of <100> vacancy dislocation loops. When the PKA energy is enough to dissolve the defect clusters, <100> vacancy dislocation loops are more likely to form. Furthermore, cascade overlap with interstitial clusters in Ti-V-Ta MPEA is a possible mechanism for the formation of <100> interstitial dislocation loops. This study can help to understand the evolution behavior of irradiation defects in Ti-V-Ta MPEA, and provide theoretical support for the composition design and optimization of high-entropy alloys.

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Recoil energy dependence of primary radiation damage in tungsten from cascade overlap with voids

Cited by 3 publications

References 37 publications

Study of the Radiation Damage Kinetics in NbTiVZr High-Entropy Alloys Irradiated by Heavy Ions

Study of the Radiation Damage Kinetics in NbTiVZr High-Entropy Alloys Irradiated by Heavy Ions

Fast generation of reliable primary radiation damage of BCC tungsten by sampling molecular dynamics databases

Cascade overlap simulation of formation of dislocation loops in Ti-V-Ta multi-principal element alloy

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