Lattice distortion and re-distortion affecting irradiation tolerance in high entropy alloys

Wang, Peng-wei; Li, Ming-fei; Malomo, Babafemi; Yang, Liang

doi:10.1039/d3nr03465h

Cited by 7 publications

(2 citation statements)

References 58 publications

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“…The use of phase diagram calculations further elucidates the impact of temperature on phase composition, facilitating the assessment of alloy phase stability. Additionally, employing first principles calculations [41,42] from a thermodynamic perspective enables a deeper analysis of the alloy. This approach yields critical data, including entropy, enthalpy, and Gibbs free energy, which are essential for comprehending the thermodynamic properties and potential performance of the alloy.…”

Section: Composition Design and Preparation Of Rheasmentioning

confidence: 99%

A Review of Irradiation-Tolerant Refractory High-Entropy Alloys

Wang,

Yang,

Shu

et al. 2023

Metals

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Along with the globalization of environmental problems and the rapid development of the field of nuclear technologies, the severe irradiation damage of materials has become a big issue, restricting the development of advanced nuclear reactor systems. Refractory high-entropy alloys (RHEAs) have the characteristics of a complex composition, a short-range order, and lattice distortion and possess a high phase stability, outstanding mechanical properties, and excellent irradiation resistance at elevated temperatures; thus, they are expected to be promising candidates for advanced nuclear reactors. This review summarizes the design, preparation, and irradiation resistance of irradiation-tolerant RHEAs. It encompasses a comprehensive analysis of various aspects, including the evolution of defects, changes in microstructure, and the degradation in properties. Furthermore, the challenges and insufficiently researched areas regarding these alloys are identified and discussed. Building on this foundation, the review also provides a forward-looking perspective, outlining potential avenues for future research.

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Section: Composition Design and Preparation Of Rheasmentioning

confidence: 99%

A Review of Irradiation-Tolerant Refractory High-Entropy Alloys

Wang,

Yang,

Shu

et al. 2023

Metals

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“…The structural properties and performances of high-entropy alloys are unique and interesting issues that have attracted intensive attention [1][2][3][4][5][6][7][8][9][10]. HEAs consisting of four or more elements with equal atomic concentrations are intriguing materials because of their excellent comprehensive properties as structural materials [2] which contribute to sluggish diffusion [3,7,9], critical internal lattice distortion [8,[11][12][13], and corrosion resistance [14][15][16]. More demands for nuclear energy are met using HEAs, which are considered promising materials for fusion and generation IV fission reactors [17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Defects Act in an “Introverted” Manner in FeNiCrCoCu High-Entropy Alloy under Primary Damage

Zhang,

Kan,

Liang

et al. 2024

Metals

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High-entropy alloys (HEAs) attract much attention as possible radiation-resistant materials due to their several unique properties. In this work, the generation and evolution of the radiation damage response of an FeNiCrCoCu HEA and bulk Ni in the early stages were explored using molecular dynamics (MD). The design, concerned with investigating the irradiation tolerance of the FeNiCrCoCu HEA, encompassed the following: (1) The FeNiCrCoCu HEA structure was obtained through a hybrid method that combined Monte Carlo (MC) and MD vs. the random distribution of atoms. (2) Displacement cascades caused by different primary knock-on atom (PKA) energy levels (500 to 5000 eV) of the FeNiCrCoCu HEA vs. bulk Ni were simulated. There was almost no element segregation in bulk FeNiCrCoCu obtained with the MD/MC method by analyzing the Warren–Cowley short-range order (SRO) parameters. In this case, the atom distribution was similar to the random structure that was selected as a substrate to conduct the damage cascade process. A mass of defects (interstitials and vacancies) was generated primarily by PKA departure. The number of adatoms grew, which slightly roughened the surface, and the defects were distributed deeper as the PKA energy increased for both pure Ni and the FeNiCrCoCu HEA. At the time of thermal spike, one fascinating phenomenon occurred where the number of Frenkel pairs for HEA was more than that for pure Ni. However, we obtained the opposite result, that fewer Frenkel pairs survived in the HEA than in pure Ni in the final state of the damage cascade. The number and size of defect clusters grew with increasing PKA energy levels for both materials. Defects were suppressed in the HEA; that is to say, defects were “cowards”, behaving in an introverted manner according to the anthropomorphic rhetorical method.

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