Role of lattice resistance in the shock dynamics of fcc-structured high entropy alloy

Peng, Jing; Li, Jia; Mohammadzadeh, Roghayeh

doi:10.1016/j.mtcomm.2022.104884

Cited by 2 publications

(2 citation statements)

References 47 publications

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Section: Formation and Stability Of High-entropy Alloy Structuresmentioning

confidence: 99%

“…HEAs inherently possess disrupted landscapes due to their chemically random structures, arising from the incorporation of multiple elements in significant proportions within their crystal lattice [43][44][45]. This deviation from the traditional Hume-Rothery rules leads to a material with a diverse array of atomic radii, electronegativities, valences, and magnetic moments, creating distinctive nearest-neighbor environments and a distorted energy landscape with irregular bond lengths and charge densities [31].…”

Section: Formation and Stability Of High-entropy Alloy Structuresmentioning

confidence: 99%

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A Modern Approach to HEAs: From Structure to Properties and Potential Applications

Nartita,

Ionita,

Demetrescu

2024

Crystals

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High-entropy alloys (HEAs) are advanced materials characterized by their unique and complex compositions. Characterized by a mixture of five or more elements in roughly equal atomic ratios, these alloys diverge from traditional alloy formulations that typically focus on one or two principal elements. This innovation has paved the way for subsequent studies that have expanded our understanding of HEAs, highlighting the role of high mixing entropy in stabilizing fewer phases than expected by traditional phase prediction methods like Gibbs’s rule. In this review article, we trace the evolution of HEAs, discussing their synthesis, stability, and the influence of crystallographic structures on their properties. Additionally, we highlight the strength–ductility trade-off in HEAs and explore strategies to overcome this challenge. Moreover, we examine the diverse applications of HEAs in extreme conditions and their promise for future advancements in materials science.

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Section: Formation and Stability Of High-entropy Alloy Structuresmentioning

confidence: 99%

Section: Formation and Stability Of High-entropy Alloy Structuresmentioning

confidence: 99%

A Modern Approach to HEAs: From Structure to Properties and Potential Applications

Nartita,

Ionita,

Demetrescu

2024

Crystals

View full text Add to dashboard Cite

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Orientation effects on shock-induced plastic deformation in FeNiCoCu high entropy alloy

Li,

Xu,

Lang

et al. 2024

Journal of Applied Physics

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FeNiCoCu high-entropy alloys (HEAs) demonstrate promising potential for widespread use in structural and functional applications. However, a thorough understanding of dynamic deformation processes in FeNiCoCu HEA is limited due to technological constraints in detecting real-time microstructural developments at the atomic level. This study examines the shock-induced plastic deformations in the equiatomic FeNiCoCu HEA, focusing on crystallographic orientation and particle velocity, using nonequilibrium molecular dynamics simulations. We obtained the P−V/V0, P−T, P−Up, and Us−Up Hugoniot relations and evaluated their anisotropy. The shock velocity, stress, and shear stress exhibit orientation dependence due to the differences in the plastic deformation mechanism. For shock loading along [100] orientations, dislocation dominates at lower shock intensities. However, a phase transition from face-centered-cubic (FCC) to body-centered-cubic becomes the primary plastic deformation at high shock intensity. For shock loading along [112¯] and [111] orientations, the generation of disordered structures and dislocation activities is revealed to play an important role in the development of localized plastic deformation. Moreover, the competition of disordered and hexagonal-close-packed (HCP) atoms is observed. The transition from FCC to disordered atoms provides nucleation sites for dislocations, and the slip of dislocations around disordered atoms leads to the formation of HCP structures. These findings are very helpful for learning the dynamic deformation behavior of FeNCoCu HEA.

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Role of lattice resistance in the shock dynamics of fcc-structured high entropy alloy

Cited by 2 publications

References 47 publications

A Modern Approach to HEAs: From Structure to Properties and Potential Applications

A Modern Approach to HEAs: From Structure to Properties and Potential Applications

Orientation effects on shock-induced plastic deformation in FeNiCoCu high entropy alloy

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