170 citations · 938 across the 42 of their papers we have counts for
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Microstructural and material property changes in severely deformed Eurofer-97
Kay Song, Guanze He, Abdallah Reza +7
Severe plastic deformation changes the microstructure and properties of steels, which may be favourable for their use in structural components of nuclear reactors. In this study, h…
Dose and compositional dependence of irradiation-induced property change in FeCr
Kay Song, Dina Sheyfer, Kenichiro Mizohata +8
Ferritic/martensitic steels will be used as structural components in next generation nuclear reactors. Their successful operation relies on an understanding of irradiation-induced…
Dislocation Pinning in Helium-Implanted Tungsten: A Molecular Dynamics Study
Suchandrima Das, Andrea Sand, Felix Hofmann
The interaction of edge dislocation with helium-implantation-induced defects in tungsten is investigated using molecular dynamics. Following prior investigations, we consider defec…
The Effect of High Pressure Torsion on Irradiation Hardening of Eurofer-97
Gregory Strangward-Pryce, Kay Song, Kenichiro Mizohata +1
We investigated the effect of nano-structuring by high-pressure torsion (HPT) on the irradiation performance of Eurofer-97. Material was deformed to shear strains from 0 to ~230, a…
Elastic Strain Associated with Irradiation-Induced Defects in Self-ion Irradiated Tungsten
Guanze He, Hongbing Yu, Phani Karamched +2
Elastic interactions play an important role in controlling irradiation damage evolution, but remain largely unexplored experimentally. Using transmission electron microscopy (TEM)…
Refinements for Bragg coherent X-ray diffraction imaging: Electron backscatter diffraction alignment and strain field computation
David Yang, Mark T. Lapington, Guanze He +8
Bragg coherent X-ray diffraction imaging (BCDI) allows the three-dimensional (3D) measurement of lattice strain along the scattering vector for specific microcrystals. If at least…
Computation of Burgers Vectors from Elastic Strain and Lattice Rotation Data
Jacques Cloete, Edmund Tarleton, Felix Hofmann
A theoretical framework for computation of Burgers vectors from strain and lattice rotation data in materials with low dislocation density is presented, as well as implementation i…
Thermal diffusivity recovery and defect annealing kinetics of self-ion implanted tungsten probed by insitu Transient Grating Spectroscopy
Abdallah Reza, Guanze He, Cody A. Dennett +3
Tungsten is a promising candidate material for plasma-facing armour components in future fusion reactors. A key concern is irradiation-induced degradation of its normally excellent…
In situ Bragg coherent X-ray diffraction imaging of corrosion in a Co-Fe alloy microcrystal
David Yang, Nicholas W. Phillips, Kay Song +5
Corrosion is a major concern for many industries, as corrosive environments can induce structural and morphological changes that lead to material dissolution and accelerate materia…
Deformation Behaviour of Ion-Irradiated FeCr: A Nanoindentation Study
Kay Song, Hongbing Yu, Phani Karamched +3
Understanding the mechanisms of plasticity in structural steels is essential for the operation of next-generation fusion reactors. Elemental composition, particularly the amount of…
An estimate for thermal diffusivity in highly irradiated tungsten using Molecular Dynamics simulation
Daniel R Mason, Abdallah Reza, Fredric Granberg +1
The changing thermal conductivity of an irradiated material is among the principal design considerations for any nuclear reactor, but at present few models are capable of predictin…
Orientation dependence of the nano-indentation behaviour of pure tungsten
Hongbing Yu, Suchandrima Das, Haiyang Yu +3
Coupling of nano-indentation and crystal plasticity finite element (CPFE) simulations is widely used to quantitatively probe the small-scale mechanical behaviour of materials. Earl…
Annealing of focused ion beam damage in gold microcrystals: An in situ Bragg coherent X-ray diffraction imaging study
David Yang, Nicholas W. Phillips, Kay Song +3
Focused ion beam (FIB) techniques are commonly used to machine, analyse and image materials at the micro- and nanoscale. However, FIB modifies the integrity of the sample by creati…
Nanoscale lattice strains in self-ion implanted tungsten
N. W. Phillips, H. Yu, S. Das +6
Developing a comprehensive understanding of the modification of material properties by neutron irradiation is important for the design of future fission and fusion power reactors.…
Characterising Ion-Irradiated FeCr: Hardness, Thermal Diffusivity and Lattice Strain
Kay Song, Suchandrima Das, Abdallah Reza +6
Ion-irradiated FeCr alloys are useful for understanding and predicting neutron-damage in the structural steels of future nuclear reactors. Previous studies have largely focused on…
Non-destructive study of collision cascade damage in self-ion irradiated tungsten using HR-EBSD and ECCI
Hongbing Yu, Phani Karamched, Suchandrima Das +3
Understanding defect production and evolution under irradiation is a long-standing multi-scale problem. Conventionally, experimental examination of irradiation-induced defects (IID…
Dislocation density distribution at slip band-grain boundary intersections
Yi Guo, David M. Collins, Edmund Tarleton +3
We study the mechanisms of slip transfer at a grain boundary, in titanium, using Differential Aperture X-ray Laue Micro-diffraction (DAXM). This 3D characterization tool enables me…
Thermal diffusivity degradation and point defect density in self-ion implanted tungsten
Abdallah Reza, Hongbing Yu, Kenichiro Mizohata +1
Using transient grating spectroscopy (TGS) we measure the thermal diffusivity of tungsten exposed to different levels of 20 MeV self-ion irradiation. Damage as low as 3.2 x 10^-4 d…
Surface terraces in pure tungsten formed by high-temperature oxidation
Hongbing Yu, Suchandrima Das, Junliang Liu +2
We observe large-scale surface terraces in tungsten oxidised at high temperature and in high vacuum. Their formation is highly dependent on crystal orientation, with only {111} gra…
Mapping data between sample and detector conjugated spaces in Bragg coherent diffraction imaging
David Yang, Nicholas W. Phillips, Felix Hofmann
Bragg coherent X-ray diffraction imaging (BCDI) is a non-destructive, lensless method for 3D-resolved, nanoscale strain imaging in micro-crystals. A challenge, particularly for new…
Transient grating spectroscopy of thermal diffusivity degradation in deuterium implanted tungsten
Abdallah Reza, Yevhen Zayachuk, Hongbing Yu +1
Using transient grating spectroscopy, we measure thermal diffusivity and surface acoustic wave speed in tungsten exposed to different fluences of deuterium plasma. Scanning electro…
Nano-scale imaging of the full strain tensor of specific dislocations extracted from a bulk sample
Felix Hofmann, Nicholas W. Phillips, Suchandrima Das +5
Lattice defects play a key role in determining the properties of crystalline materials. Probing the 3D lattice strains that govern their interactions remains a challenge. Bragg Coh…
Hardening and Strain Localisation in Helium-Ion-Implanted Tungsten
Suchandrima Das, Hongbing Yu, Edmund Tarleton +1
Tungsten is the main candidate material for plasma-facing armour components in future fusion reactors. In-service, fusion neutron irradiation creates lattice defects through collis…
Mapping the full lattice strain tensor of a single dislocation by High Angular Resolution Transmission Kikuchi Diffraction (HR-TKD)
Hongbing Yu, Junliang Liu, Phani Karamched +2
The full lattice strain tensor and lattice rotations induced by a dislocation in pure tungsten were mapped using high-resolution transmission Kikuchi diffraction (HR-TKD) in a SEM.…