Small scale mechanical testing of irradiated materials

P Hosemann, C Shin, D Kiener - Journal of Materials Research, 2015 - cambridge.org
Small specimen testing techniques have a long history in nuclear material research due to
the limitations posed by nuclear facilities. The limited space in reactors and the fact that the …

Indentation size effect, geometrically necessary dislocations and pile-up effects in hardness testing of irradiated nickel

MA Mattucci, I Cherubin, P Changizian, T Skippon… - Acta Materialia, 2021 - Elsevier
The indentation size effect response, based on dislocation density, of commercially pure Ni
irradiated at 120° C with 6MeV protons to 0.1 dpa, was compared with non-irradiated Ni …

Strain Localisation and Fracture of Nuclear Reactor Core Materials

M Griffiths - Journal of Nuclear Engineering, 2023 - mdpi.com
The production of prismatic dislocation loops in nuclear reactor core materials results in
hardening because the loops impede dislocation motion. Yielding often occurs by a …

STEM characterization of dislocation loops in irradiated FCC alloys

P Xiu, H Bei, Y Zhang, L Wang, KG Field - Journal of Nuclear Materials, 2021 - Elsevier
In this study, we demonstrate the methodology systematically developed for dislocation loop
(perfect and faulted loops) imaging and analysis in irradiated face-centered-cubic (FCC) …

Anisotropic defect distribution in He+-irradiated 4H-SiC: Effect of stress on defect distribution

S Yang, Y Nakagawa, M Kondo, T Shibayama - Acta materialia, 2021 - Elsevier
Irradiation-induced anisotropic swelling in hexagonal α-SiC is known to degrade the
mechanical properties of SiC; however, the associated physical mechanism and …

Materials swelling revealed through automated semantic segmentation of cavities in electron microscopy images

R Jacobs, P Patki, MJ Lynch, S Chen, D Morgan… - Scientific reports, 2023 - nature.com
Accurately quantifying swelling of alloys that have undergone irradiation is essential for
understanding alloy performance in a nuclear reactor and critical for the safe and reliable …

Automated detection of helium bubbles in irradiated X-750

CM Anderson, J Klein, H Rajakumar, CD Judge… - Ultramicroscopy, 2020 - Elsevier
Imaging nanoscale features using transmission electron microscopy is key to predicting and
assessing the mechanical behavior of structural materials in nuclear reactors. Analyzing …

First principle studies of effects of solute segregation on grain boundary strength in Ni-based alloys

Z Xiao, L He, XM Bai - Journal of Alloys and Compounds, 2021 - Elsevier
Thermal annealing or radiation induced segregation of solute and impurity elements to grain
boundaries (GBs) in metallic alloys changes GB chemistry and thus can alter the GB …

Applying a new push-to-pull micro-tensile testing technique to evaluate the mechanical properties of high dose Inconel X-750

C Howard, CD Judge, P Hosemann - Materials Science and Engineering: A, 2019 - Elsevier
The results from a novel, micro-tensile testing technique, employing a micro-electro-
mechanical system, operated in a push-to-pull configuration, to study the effects of radiation …

Effect of free surfaces on localized plastic deformation in single-crystal nickel containing helium bubbles and radiation-induced self-interstitial atom clusters

TY Liu, MJ Demkowicz - Journal of Nuclear Materials, 2023 - Elsevier
This paper presents molecular dynamics (MD) simulations of plastic deformation in single-
crystal Ni models containing internal distributions of helium (He) bubbles and self-interstitial …