Friction-induced rapid amorphization in a wear-resistant (CoCrNi)88Mo12 dual-phase medium-entropy alloy at cryogenic temperature

Ren, Yin; Huang, Zhuobin; Wang, Yucheng; Zhou, Qin; Yang, Weiqing; Li, Qikang; Jia, Qian; Wang, Haifeng

doi:10.1016/j.compositesb.2023.110833

Cited by 75 publications

(9 citation statements)

References 47 publications

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“…The mechanical properties of nanocrystalline (NC) metals are essentially different from those of traditional coarse-grained metals, mainly because the volume percentage of the grain boundary (GB) is too large to be ignored due to its nanoscale grain size. Enormous amount of research has proved the excellent room-temperature mechanical strength of nanocrystalline metals [1][2][3][4][5]. At present, the most promising application of nanocrystalline metals in mechanics is as a surface layer, possessing unique and excellent properties that traditional bulk materials do not, such as high strength and friction resistance.…”

Section: Introductionmentioning

confidence: 99%

Initial Vacancy-Dependent High-Temperature Creep Behavior of Nanocrystalline Ni by Molecular Dynamics Simulation

Cui,

Shao,

Shi

et al. 2024

Coatings

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Nanocrystalline metals possessing excellent mechanical strength have great potential to replace traditional metal materials as structural materials, but their poor resistance to creep deformation seriously restricts their engineering applications at high temperatures. The high-temperature creep behavior of nanocrystalline Ni with different volume fractions of initial vacancies ranging from 0% to 10% was studied systematically by molecular dynamics simulation in this study. The results showed that the steady-state creep displacement first increased and then decreased with increasing initial vacancy concentration, reaching the maximum when the initial vacancy concentration was 6%. The microstructural characteristics, such as quantity increment and distribution of the vacancies, the number and types of dislocations, and shear strain distribution during creeping, were analyzed in detail. The deformation-induced vacancies formed at the grain boundary (GB) in the initial creep stage, and their variation trend with the initial vacancy concentration was consistent with that of the creep displacement, indicating that the initial vacancy-dependent high-temperature creep behavior of nanocrystalline Ni was mainly determined by the rapidly increasing number of vacancies at the GB in the initial creep stage. Afterwards, the deformation-induced, vacancy-assisted 1/6{112} Shockley partial dislocation activities dominated the creep deformation of nanocrystalline Ni in the steady-state creep stage. The results can provide theoretical support for expanding the application of nanocrystalline metals from the perspective of crystal defect engineering.

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Section: Introductionmentioning

confidence: 99%

Initial Vacancy-Dependent High-Temperature Creep Behavior of Nanocrystalline Ni by Molecular Dynamics Simulation

Cui,

Shao,

Shi

et al. 2024

Coatings

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“…Molybdenum disulfide (MoS 2 ), a prototypical two-dimensional (2D) transition metal dichalcogenide (TMD), has garnered significant attention within the academic community owing to its distinctive layered structure and inherent properties . The robust sulfur–molybdenum (S–Mo) covalent bond and large specific surface area confer it with the advantages of exceptional strength, , remarkable chemical stability, and outstanding catalytic performance. , Importantly, similar to graphene, the adjacent layers of MoS 2 are linked by weak van der Waals interactions, which easily lead to interlayer slip and low friction (coefficient of friction lower than 0.1). − Given its exceptional performance as demonstrated above, the MoS 2 film plays a pivotal role in providing lubrication for critical components in key sectors such as aerospace, navigation, and nuclear industries. − …”

Section: Introductionmentioning

confidence: 99%

A Molecular Dynamics Study on the Defect Formation and Mechanical Behavior of Molybdenum Disulfide under Irradiation

Shi,

Wang,

Zhou

et al. 2024

ACS Appl. Mater. Interfaces

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Due to its appealing characteristics, molybdenum disulfide (MoS 2 ) presents a promising avenue for the exploration of lubrication protection materials in high-energy irradiation scenarios. Herein, we present a comprehensive investigation into the defect behavior of multilayer MoS 2 under argon (Ar) atom irradiation leveraging molecular dynamics simulations. We have demonstrated the energy shifts and structural evolution in MoS 2 upon irradiation, including the emergence of Frenkel defects and intricate defect clusters. The structural damage exhibits an initial increase followed by a subsequent decrease as the incident kinetic energy increases, ultimately peaking at 2.5 keV. Moreover, we investigated the effect of postannealing on defect recovery and conducted the uniaxial tensile and interlayer shearing simulation in order to provide valuable insights for the defect evolution and its impact on mechanical and tribological properties. Furthermore, we have proposed the optimal annealing temperature. The current study reveals the atomic mechanisms underlying irradiation-induced damage on the structural integrity and mechanical performance of MoS 2 , thereby providing crucial guidance for its vital application in nuclear reactors and aerospace industries.

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“…As such, it is essential to identify and minimize potential sources of contamination, including the presence of unwanted elements on the surface of the tinplate. In identifying sources of pollution, several criteria are utilized, encompassing factors like chemical composition, environmental impact, and concentration levels [4,5] . Elements or compounds known for their harmful effects on the environment or human health are typically labeled as pollutants.…”

Section: Introductionmentioning

confidence: 99%

Examination of surface contamination and impurities in tinplate samples, both passivated and non-passivated

Meysami,

Amini Najafabadi,

Nemati Varnoosfaderani

et al. 2023

Mater. Tech. Rep.

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This study examined the surfaces of non-passivated and passivated tinplate samples, as well as the impurities present on them, using SEM, EDS, and GDOES. Additionally, solutions were analyzed using ICP in order to identify any correlations between the elements present in the solutions and on the strip surfaces. The results from GDOES indicated the presence of unwanted elements, such as Sn, S, Cr, N, P, Zn, Fe, Mn, C, and Si, on both the passivated and non-passivated sample surfaces. SEM analysis of the passivated sample revealed light and dark regions in parallel lines, which were observed ahead of the rolling direction. EDS analysis indicated that the light areas were rich in Sn while the dark areas were rich in Fe, and C was identified as an unwanted element in both areas. O and Cr were only found in the dark areas. EDS analysis of the impurities revealed Na, S, Cl, Ca, Mg, Si, N, and Al as unwanted elements. The results suggest that unwanted elements are transferred from the steel strip surface to different solutions in the tinplate line, causing pollution in various solutions.

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Friction-induced rapid amorphization in a wear-resistant (CoCrNi)88Mo12 dual-phase medium-entropy alloy at cryogenic temperature

Cited by 75 publications

References 47 publications

Initial Vacancy-Dependent High-Temperature Creep Behavior of Nanocrystalline Ni by Molecular Dynamics Simulation

Initial Vacancy-Dependent High-Temperature Creep Behavior of Nanocrystalline Ni by Molecular Dynamics Simulation

A Molecular Dynamics Study on the Defect Formation and Mechanical Behavior of Molybdenum Disulfide under Irradiation

Examination of surface contamination and impurities in tinplate samples, both passivated and non-passivated

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