Molecular dynamics study of defect evolutions and mechanical properties of W/Fe semi-coherent interfaces under irradiation

Article Materials Science, Multidisciplinary

Cohesion properties and fracture toughness of Fe/W interfaces with additions of Re and Cr

Qian Wang et al.

Summary: Research found that at the Fe/W interface, Re prefers to be at the Fe position, and the addition of Re increases cohesion strength and fracture toughness, while Cr causes unstable changes.

VACUUM (2022)

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Article Materials Science, Multidisciplinary

Probabilistic analysis of cleavage fracture in commercial polycrystalline tungsten

Mathias Jetter et al.

Summary: Polycrystalline tungsten is a promising candidate for plasma-facing armour material in future fusion reactors. Below the DBTT, tungsten exhibits brittle or semi-brittle behavior, with little to no plastic deformation before cleavage fracture. Additionally, tungsten has low fracture toughness and significant scattering in strength properties. Statistical treatment of strength values is required, and four-point bending tests were conducted in the temperature range of room temperature to 400 degrees C to enable Weibull and Beremin analyses. Finite element simulations support the analyses, and Weibull and Beremin parameter values are determined from the simulation results.

JOURNAL OF NUCLEAR MATERIALS (2022)

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Article Materials Science, Multidisciplinary

Cohesion properties and irradiation tolerance of W-Fe graded interfaces from molecular dynamics simulation

Liang Chen et al.

Summary: This study aims to construct W-Fe graded interfaces with excellent interface cohesion and irradiation resistance. The adhesion and fracture toughness of various W-Fe graded bilayers are systematically explored, and the results indicate that a higher number of W-rich layers should be designed to achieve higher strength and superior fracture toughness. Additionally, the addition of Fe in the W-rich side and the addition of W in the Fe-rich side can both enhance the irradiation resistance in terms of mechanical properties. However, the additive composition in the Fe-rich side is significantly larger than that in the W-rich side. Based on the interface strength, fracture toughness, and irradiation tolerance, a graded structure design of W90Fe10/W75Fe25 /W6(0)Fe(40)/W40Fe60/W25Fe75 is suggested from a theoretical perspective.

JOURNAL OF NUCLEAR MATERIALS (2022)

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Article Chemistry, Multidisciplinary

Evaluation of structural and mechanical strength of symmetric tilt interface in W/Fe composite laminate using molecular dynamics

Juan Ding et al.

Summary: In this study, a W/Fe composite laminate is constructed using a symmetric tilt interface relationship. The performance of the newly built W/Fe symmetric tilt interfaces is evaluated and compared with other boundaries. The results show that some of the W/Fe symmetric tilt interfaces have comparable interface energy and better mechanical properties than expected.

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS (2022)

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Article Materials Science, Multidisciplinary

Fundamental effects of copper on dislocation loops and mechanical property of tungsten under irradiation

W. Wei et al.

Summary: Molecular dynamics simulations reveal that the addition of Cu can improve the irradiation resistance of W by promoting a uniform distribution of point defects and hindering the formation of dislocation loops.

JOURNAL OF NUCLEAR MATERIALS (2021)

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Article Materials Science, Coatings & Films

Tungsten-steel composites and FGMs prepared by argon-shrouded plasma spraying

J. Matejicek et al.

Summary: Tungsten-steel composites and functionally graded materials were prepared using a high power hybrid water-argon plasma spraying system to reduce stress concentration at the interface. Optimized parameters were selected based on comprehensive characterization, and hot isostatic pressing (HIP) was explored to improve the density and thermal conductivity of the coatings.

SURFACE & COATINGS TECHNOLOGY (2021)

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Review Materials Science, Multidisciplinary

Overview of the Mechanical Properties of Tungsten/Steel Brazed Joints for the DEMO Fusion Reactor

Diana Bachurina et al.

Summary: This work examines a state-of-the-art solution to the problem of joining tungsten to steel by brazing, aiming to summarize best practices, identify shortcomings, and clarify mechanical property requirements.

METALS (2021)

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Article Materials Science, Multidisciplinary

Suppressing irradiation induced grain growth and defect accumulation in nanocrystalline tungsten through grain boundary doping

W. Streit Cunningham et al.

Summary: The study investigates the role of dopants in controlling defect annihilation behavior in nanocrystalline W alloy, with titanium stabilizing the nanostructure against irradiation induced grain growth. The findings suggest that titanium enhances the grain boundary sink strength for defects through transient stages of accumulation and recovery.

ACTA MATERIALIA (2021)

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Article Materials Science, Multidisciplinary

In-situ TEM investigation of 30 keV he+ irradiated tungsten: Effects of temperature, fluence, and sample thickness on dislocation loop evolution

Yipeng Li et al.

Summary: In situ irradiations on tungsten revealed that pre-existing dislocation lines have a profound effect on the size, density and Burgers vector of dislocation loops. The interaction between high density helium clusters can stimulate the formation of <100> loops, while the reaction of two 1/2<111> loop variants driven by long-time and elevated temperature irradiation is also a driving force for <100> loop formation.

ACTA MATERIALIA (2021)

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Article Materials Science, Multidisciplinary

Mechanism of brittle-to-ductile transition in tungsten under small-punch testing

Yu-Heng Zhang et al.

Summary: In this study, small-punch testing was conducted to explore the mechanism of brittle-to-ductile transition in as-rolled tungsten. Temperature and orientation dependent slip activities were found to be decisive factors controlling the transition.

ACTA MATERIALIA (2021)

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Article Physics, Multidisciplinary

Overview of challenges and developments in joining tungsten and steel for future fusion reactors

S. Heuer et al.

PHYSICA SCRIPTA (2020)

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Article Materials Science, Multidisciplinary

Correlation of microstructural and mechanical properties of neutron irradiated EUROFER97 steel

M. Klimenkov et al.

JOURNAL OF NUCLEAR MATERIALS (2020)

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Article Materials Science, Multidisciplinary

A new way to net-shaped synthesis tungsten steel by selective laser melting and hot isostatic pressing

N. Kang et al.

VACUUM (2020)

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Article Materials Science, Multidisciplinary

On the use of ion beams to emulate the neutron irradiation behaviour of tungsten

R. W. Harrison

VACUUM (2019)

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Article Materials Science, Multidisciplinary

Mechanical properties of single-crystal tungsten irradiated in a mixed spectrum fission reactor

L. M. Garrison et al.

JOURNAL OF NUCLEAR MATERIALS (2019)

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Article Physics, Applied

Structural stability and mechanical property of Fe-W solid solutions from a constructed Fe-W potential

S. T. Mi et al.

JOURNAL OF APPLIED PHYSICS (2019)

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Article Materials Science, Multidisciplinary

Irradiation effect on mechanical properties of tungsten from molecular dynamic simulation

L. Chen et al.

MATERIALS LETTERS (2019)

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Article Materials Science, Multidisciplinary

Unprecedented irradiation resistance of nanocrystalline tungsten with equiaxed nanocrystalline grains to dislocation loop accumulation

O. El-Atwani et al.

ACTA MATERIALIA (2019)

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Review Physics, Multidisciplinary

Challenges for plasma-facing components in nuclear fusion

Jochen Linke et al.

MATTER AND RADIATION AT EXTREMES (2019)

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Article Materials Science, Multidisciplinary

Response of oxide nanoparticles in an oxide dispersion strengthened steel to dynamic plastic deformation

Zhenbo Zhang et al.

ACTA MATERIALIA (2018)

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Article Microscopy

Three-dimensional scanning transmission electron microscopy of dislocation loops in tungsten

S. Hasanzadeh et al.

MICRON (2018)

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Article Materials Science, Multidisciplinary

Damage Study of Irradiated Tungsten using fast focus mode of a 2.2 kJ plasma focus

S. H. Saw et al.

VACUUM (2017)

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Review Energy & Fuels

Identification of safety gaps for fusion demonstration reactors

Y. Wu et al.

NATURE ENERGY (2016)

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Article Materials Science, Multidisciplinary

Challenges and opportunities of modeling plasma-surface interactions in tungsten using high-performance computing

Brian D. Wirth et al.

JOURNAL OF NUCLEAR MATERIALS (2015)

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Article Materials Science, Multidisciplinary

Work function and cohesion properties of W-Fe interfaces

Q. Q. Ren et al.

MATERIALS LETTERS (2015)

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Article Materials Science, Multidisciplinary

Point defect stability in a semicoherent metallic interface

C. Gonzalez et al.

PHYSICAL REVIEW B (2015)

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Review Materials Science, Multidisciplinary

Designing Radiation Resistance in Materials for Fusion Energy

S. J. Zinkle et al.

ANNUAL REVIEW OF MATERIALS RESEARCH, VOL 44 (2014)

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Article Physics, Multidisciplinary

ITER full tungsten divertor qualification program and progress

T. Hirai et al.

PHYSICA SCRIPTA (2014)

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Article Materials Science, Multidisciplinary

Materials challenges in nuclear energy

S. J. Zinkle et al.

ACTA MATERIALIA (2013)

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Article Physics, Multidisciplinary

Solving the Puzzle of ⟨100⟩ Interstitial Loop Formation in bcc Iron

Haixuan Xu et al.

PHYSICAL REVIEW LETTERS (2013)

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Article Materials Science, Multidisciplinary

Extracting dislocations and non-dislocation crystal defects from atomistic simulation data

Alexander Stukowski et al.

MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING (2010)

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Article Materials Science, Multidisciplinary

Surface x-ray structure analysis of periodic misfit dislocations in Fe/W(110)

R Popescu et al.

PHYSICAL REVIEW B (2003)

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Article Materials Science, Multidisciplinary

Growth and magnetism of Fe nanostructures on W(001)

W Wulfhekel et al.

PHYSICAL REVIEW B (2003)

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Article Materials Science, Multidisciplinary

TEM study on deuterium-irradiation-induced defects in tungsten and molybdenum

T Matsui et al.

JOURNAL OF NUCLEAR MATERIALS (2000)

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Molecular dynamics study of defect evolutions and mechanical properties of W/Fe semi-coherent interfaces under irradiation

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