Radiation damage in nanostructured materials
Materials subjected to high dose irradiation by energetic particles often experience severe
damage in the form of drastic increase of defect density, and significant degradation of their …
damage in the form of drastic increase of defect density, and significant degradation of their …
Helium, hydrogen, and fuzz in plasma-facing materials
KD Hammond - Materials Research Express, 2017 - iopscience.iop.org
Tungsten, the primary material under consideration as the divertor material in magnetic-
confinement nuclear fusion reactors, has been known for the last decade to form'fuzz'—a …
confinement nuclear fusion reactors, has been known for the last decade to form'fuzz'—a …
In-situ TEM investigation of 30 keV he+ irradiated tungsten: Effects of temperature, fluence, and sample thickness on dislocation loop evolution
Y Li, L Wang, G Ran, Y Yuan, L Wu, X Liu, X Qiu, Z Sun… - Acta Materialia, 2021 - Elsevier
In-situ irradiations with 30 keV He+ were performed on tungsten in an investigation of the
influences of irradiation temperature and fluence, pre-existing dislocation and sample …
influences of irradiation temperature and fluence, pre-existing dislocation and sample …
An empirical potential for simulating vacancy clusters in tungsten
DR Mason, D Nguyen-Manh… - Journal of Physics …, 2017 - iopscience.iop.org
We present an empirical interatomic potential for tungsten, particularly well suited for
simulations of vacancy-type defects. We compare energies and structures of vacancy …
simulations of vacancy-type defects. We compare energies and structures of vacancy …
Mdz: An efficient error-bounded lossy compressor for molecular dynamics
Molecular dynamics (MD) has been widely used in today's scientific research across
multiple domains including materials science, biochemistry, biophysics, and structural …
multiple domains including materials science, biochemistry, biophysics, and structural …
Theoretical model of helium bubble growth and density in plasma-facing metals
We present a theoretically-motivated model of helium bubble density as a function of volume
for high-pressure helium bubbles in plasma-facing tungsten. The model is a good match to …
for high-pressure helium bubbles in plasma-facing tungsten. The model is a good match to …
[HTML][HTML] Helium aggregation and surface morphology near grain boundaries in plasma-facing tungsten
We conduct molecular dynamics simulations of helium in tungsten to study the interaction of
helium with grain boundaries. Model systems with grain boundary planes perpendicular to …
helium with grain boundaries. Model systems with grain boundary planes perpendicular to …
Helium flux effects on bubble growth and surface morphology in plasma-facing tungsten from large-scale molecular dynamics simulations
KD Hammond, IV Naeger, W Widanagamaachchi… - Nuclear …, 2019 - iopscience.iop.org
We investigate helium flux effects on helium transport and surface evolution in plasma-
facing tungsten using molecular dynamics. The simulations span two orders of magnitude …
facing tungsten using molecular dynamics. The simulations span two orders of magnitude …
Implications of microstructure in helium-implanted nanocrystalline metals
Helium bubbles are known to form in nuclear reactor structural components when
displacement damage occurs in conjunction with helium exposure and/or transmutation. If …
displacement damage occurs in conjunction with helium exposure and/or transmutation. If …
Formation of helium-bubble networks in tungsten
The nucleation and subsequent growth of helium bubbles in bulk tungsten is investigated
using molecular dynamics simulations. By considering a setting that includes the diffusion …
using molecular dynamics simulations. By considering a setting that includes the diffusion …