The effect of interstitial carbon atoms on defect evolution in high entropy alloys under helium irradiation

Su, Zhengxiong; Shi, Tan; Yang, Jinxue; Shen, Huahai; Li, Zhi Ming; Wang, Sheng; Ran, Guang; Lu, Chenyang

doi:10.1016/j.actamat.2022.117955

Cited by 32 publications

(6 citation statements)

References 68 publications

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“…Subsequently, the rugged energy landscapes decrease the energy dissipation rate by increasing the phonon scattering [39,40], and prolong the energetic ions collision-induced thermal spike which promotes the annihilation of displaced atoms with vacancies [6], and finally improves the irradiation resistance. Similar irradiation-resistance enhancement by interstitial atoms has been also reported in FeMnCoCr-system by adding a small amount of carbon or nitrogen elements [7,41].…”

Section: Resultssupporting

confidence: 82%

Structural stability under Xe-ion irradiation of TiZrNbTaV-based high-entropy alloy and nitride films

Wang

Shu

Elsukova

et al. 2023

Surface and Coatings Technology

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Section: Resultssupporting

confidence: 82%

Structural stability under Xe-ion irradiation of TiZrNbTaV-based high-entropy alloy and nitride films

Wang

Shu

Elsukova

et al. 2023

Surface and Coatings Technology

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“…Interstitial atoms can lead to stress concentration around their positions within the crystal lattice. [ 45 ] During cooling‐induced martensitic transformation, stress is generated due to the volume change associated with the phase transformation. The stress concentration can lead to localized deformation, preventing the complete development of the martensitic phase.…”

Section: Resultsmentioning

confidence: 99%

“…Interstitial atoms can lead to stress concentration around their positions within the crystal lattice. [45] During cooling-induced martensitic transformation, stress is…”

Section: Effect Of Thermal Cycling On Temperature-induced Phase Trans...mentioning

confidence: 99%

Effects of Thermal Cycling and Porosity on Phase Transformation of Porous Nanocrystalline NiTi Shape Memory Alloy: An Atomistic Simulation

Liu,

Wang,

2023

Adv Eng Mater

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In this paper, the effects of thermal cycling and porosity on the martensitic phase transformation behavior of porous nanocrystalline (NC) NiTi shape memory alloys (SMAs) at the atomic scale are investigated by molecular dynamics (MD) simulation. The simulation results show that thermal cycling causes the NC NiTi SMAs to repeatedly undergo martensitic phase transformation and inverse phase transformation processes. The martensitic phase transformation capability is suppressed with increasing porosity and number of cycles, but the suppression effect of thermal cycling is weakened with increasing porosity. Moreover, the start temperature of martensitic transformation, residual martensitic phase, and the fraction of interstitial atoms increase with increasing porosity. Thermal cycling causes the disordered structures and shear plastic deformation to accumulate as cycling increases. Recoverable shear deformation is generated within the grain, but shear plastic deformation is mainly concentrated at both grain boundaries and pore surfaces. Residual martensitic phase increases after thermal cycling These results provide important explanations and references for a deeper understanding of phase transformation behavior and pore effects caused by thermal cycling.This article is protected by copyright. All rights reserved.

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“…This composition serves as an approximation of Fe 49.5 Mn 30 Co 10 Cr 10 C 0.5 , known for its promising radiation damage resistance. 29 Previous research has shown that Fe 49.5 Mn 30 Co 10 Cr 10 C 0.5 can mitigate irradiation hardening, volumetric swelling, and radiation-induced segregation. 29 Furthermore, the introduction of carbon interstitials and delicate optimization of the alloy composition have been demonstrated to significantly impede defect evolution.…”

Section: Introductionmentioning

confidence: 99%

“…29 Furthermore, the introduction of carbon interstitials and delicate optimization of the alloy composition have been demonstrated to significantly impede defect evolution. 29 By comparing structures with paramagnetism, ferromagnetism, and no spin polarization, the influence of magnetic properties on elemental vacancy migration energy has been revealed.…”

Section: Introductionmentioning

confidence: 99%

Influence of magnetic properties on elemental vacancy migration energy in Fe49.5Mn29.4Co10.1Cr10.1C0.9 high-entropy alloy

Ibrahim,

Shi,

et al. 2024

AIP Advances

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Randomly mixing ferromagnetic (FM) and antiferromagnetic (AFM) elements in high-entropy alloys (HEAs) can create fluctuating local magnetic moments that influence the energetics of point defects. In this study, we employed first-principles calculations to investigate the influence of magnetic properties on vacancy migration energy in Fe49.5Mn29.4Co10.1Cr10.1C0.9, alongside equiatomic NiCoFeCrMn alloy. By examining structures with paramagnetism, ferromagnetism, and no spin polarization, our study reveals significant impacts of magnetic interactions on vacancy migration barriers, potentially altering the sequence of elemental migration energies if overlooked. In Fe49.5Mn29.4Co10.1Cr10.1C0.9, the order of vacancy migration barriers is Co > Fe > Mn > Cr across all magnetic states, suggesting the dominant roles of atomic properties and inherent chemical bonding. Conversely, the NiCoFeCrMn HEA exhibits a pronounced magnetic state-dependent elemental migration energy order, indicating that magnetic interactions significantly influence vacancy migration behavior in this alloy. In addition, while FM elements generally exhibit higher migration barriers, AFM elements display lower barriers in the investigated Cantor alloys, with notable variations between the studied compositions. These findings underscore the critical role of magnetism in accurate migration energy calculations, which is important for studying chemically biased diffusion and radiation-induced segregation in HEAs.

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The effect of interstitial carbon atoms on defect evolution in high entropy alloys under helium irradiation

Cited by 32 publications

References 68 publications

Structural stability under Xe-ion irradiation of TiZrNbTaV-based high-entropy alloy and nitride films

Structural stability under Xe-ion irradiation of TiZrNbTaV-based high-entropy alloy and nitride films

Effects of Thermal Cycling and Porosity on Phase Transformation of Porous Nanocrystalline NiTi Shape Memory Alloy: An Atomistic Simulation

Influence of magnetic properties on elemental vacancy migration energy in Fe49.5Mn29.4Co10.1Cr10.1C0.9 high-entropy alloy

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