In-situ TEM investigation on the evolution of He bubbles and dislocation loops in Ni-based alloy irradiated by H2+ & He+ dual-beam ions

Z Zhu, W Ji, H Huang - Journal of Materials Science & Technology, 2023 - Elsevier
The synergistic evolution mechanisms of He bubbles and dislocation loops under 30 keV H
2+ & H e+ dual-beam ions irradiation at 650° C in the Ni-based alloy GH3535, which is the …

The primary origin of dose rate effects on microstructural evolution of austenitic alloys during neutron irradiation

T Okita, T Sato, N Sekimura, FA Garner… - Journal of nuclear …, 2002 - Elsevier
The effect of dose rate on neutron-induced microstructural evolution was experimentally
estimated. Solution-annealed austenitic model alloys were irradiated at≃ 400° C with fast …

Effect of dose rate on the phase stability of a CrFeNiMn alloy

A Kamboj, EA Marquis - Scripta Materialia, 2022 - Elsevier
CrFeNi-based multi-principal element alloys (MPEAs) are being considered for nuclear
applications because of their potentially superior mechanical properties and irradiation …

Meso-timescale atomistic simulations on coalescence process of He bubbles in Fe by SEAKMC method

Y Yamamoto, S Hayakawa, T Okita, M Itakura - Computational Materials …, 2023 - Elsevier
He bubbles are characteristic microstructures under fusion reactor conditions. They
approach and coalesce through their own migration, which significantly impacts the …

The effects of loop size on the unfaulting of Frank loops in heavy ion irradiation

D Chen, K Murakami, K Dohi, K Nishida, Z Li… - Journal of Nuclear …, 2020 - Elsevier
When stainless steels are exposed to high irradiation dose, a fraction of Frank loops will
unfault and transform into perfect loops. After unfaulting, perfect loops can glide and impinge …

Stress-induced transition from vacancy annihilation to void nucleation near microcracks

PD Zarnas, BL Boyce, J Qu, R Dingreville - International Journal of Solids …, 2021 - Elsevier
The accumulation of point defects and defect clusters in materials, as seen in irradiated
metals for example, can lead to the formation and growth of voids. Void nucleation is derived …

A critical test of the classical rate theory for void swelling

T Okita, WG Wolfer - Journal of nuclear materials, 2004 - Elsevier
Complete sets of microstructural data have recently become available for two different
irradiation times and for pure ternary alloys of austenitic stainless steels. Using these data as …

Void nucleation, growth, and coalescence in irradiated metals

MP Surh, JB Sturgeon, WG Wolfer - Journal of nuclear materials, 2008 - Elsevier
A novel computational treatment of dense, stiff, coupled reaction rate equations is introduced
to study the nucleation, growth, and possible coalescence of cavities during neutron …

Molecular dynamic simulations evaluating the effect of the stacking fault energy on defect formations in face-centered cubic metals subjected to high-energy particle …

S Terayama, Y Iwase, S Hayakawa, T Okita… - Computational Materials …, 2021 - Elsevier
Austenitic stainless steels, which are used as incore structural materials in light water
reactors, are characterized by an extremely low stacking fault energy (SFE) among face …

Construction of machine-learning Zr interatomic potentials for identifying the formation process of c-type dislocation loops

T Okita, S Terayama, K Tsugawa, K Kobayashi… - Computational Materials …, 2022 - Elsevier
In this study, a Neural Network Potential (NNP) using an Artificial Neural Network (ANN) was
developed for Zr, which is used as fuel claddings in light water reactors. The reference data …