Molecular dynamics study on the dislocation evolution mechanism of temperature effect in nano indentation of FeCoCrCuNi high-entropy alloy

Du, Ye; Li, Qiang

doi:10.1080/10667857.2023.2299903

Cited by 4 publications

(2 citation statements)

References 38 publications

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“…Zhang [20] proposed the physical mechanism of a dual jet structure, suggesting the formation of unstable jets at the boundary between the cloud and the air. Despite previous research exploring cloud dispersal mechanisms, the current research results concerning the cloud dispersal mechanism are based on cylindrical cloud dispersal devices and do not address the dependence of the cloud growth mechanism on the semi-cone angle of the device [21,22]. At the same time, the mesoscopic growth mechanism of clouds is still unclear, and the existing studies lack the exploration of the mesoscopic flow characteristics of clouds.…”

Section: Introductionmentioning

confidence: 99%

Study on Multi-Scale Cloud Growth Characteristics of Frustoconical Dispersal Devices

Zhou,

Li,

Jiang

et al. 2024

Processes

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This study aims to understand cloud growth behavior and enhance cloud safety and reliability by investigating the design of cloud dispersal devices. Based on the experimental results and simulation results, this study analyzes the dispersion characteristics of cloud materials within a frustoconical device with a semi-cone angle ranging from 0° to 10° across multiple scales. The collision aggregation model for cloud particles and the multi-scale coupling mechanism for cloud growth are established. The research shows that the semi-cone angle of the device extends the effective cloud growth duration and enlarges the cloud macroscopic size. At the mesoscopic scale, vortex phenomena are observed, causing particles to converge within the cloud, resulting in collisions and aggregation. The vortices enhance the continuity of the cloud concentration. The magnitude of these vortices demonstrates a positive correlation with the magnitude of the semi-cone angle of the dispersal device. For a macroscopically stable cloud, the high-concentration area within the cloud moves outward radially with an increase in the semi-cone angle. This study provides a theoretical foundation for cloud morphology control technology, contributing to enhancing the safety and reliability of cloud systems.

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Section: Introductionmentioning

confidence: 99%

Study on Multi-Scale Cloud Growth Characteristics of Frustoconical Dispersal Devices

Zhou,

Li,

Jiang

et al. 2024

Processes

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“…Molecular dynamics (MDs) can perform a damage cascade, defect evolution, and dislocation migration behavior at the atomic level, which is conducive to revealing the radiation resistance mechanism of HEAs. FeNiCrCoCu HEAs have recently attracted a lot of attention due to its excellent performance, and further research is needed on the irradiation displacement cascade process [56][57][58][59]. Due to the limited timescale and defect suppression, the formation of defect clusters is seldom observed in the MD simulation for FeNiCrCoCu HEAs.…”

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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Effect of metalloid element on the microstructural and mechanical properties of AlCoCrCuFeNi high-entropy alloys

Chandrakar,

Chandraker,

Kumar

et al. 2024

Materials Technology

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Molecular dynamics study on the dislocation evolution mechanism of temperature effect in nano indentation of FeCoCrCuNi high-entropy alloy

Cited by 4 publications

References 38 publications

Study on Multi-Scale Cloud Growth Characteristics of Frustoconical Dispersal Devices

Study on Multi-Scale Cloud Growth Characteristics of Frustoconical Dispersal Devices

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

Effect of metalloid element on the microstructural and mechanical properties of AlCoCrCuFeNi high-entropy alloys

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