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 …

Orientation-dependent irradiation hardening in pure Zr studied by nanoindentation, electron microscopies, and crystal plasticity finite element modeling

Q Wang, C Cochrane, T Skippon, Z Wang… - International Journal of …, 2020‏ - Elsevier
Orientation-dependent irradiation hardening phenomena in pure Zr have been studied, and
the corresponding mechanisms investigated based on the combined use of SEM, TEM, and …

Radiation effect on nano-indentation properties and deformation mechanisms of a Ni-based superalloy X-750

P Changizian, Z Yao, C Lu, F Long… - Journal of Nuclear …, 2019‏ - Elsevier
Nano-indentation analysis was employed to investigate the mechanical response of heavy
ion irradiated X-750 Ni-based superalloy in both solution-treated (ST) and precipitation …

Mechanical behavior of cold-worked, precipitation-hardened Inconel X-750 before and after helium-implantation

P Changizian, Z Yao, F Long, M Top**, SX Xu… - Materials …, 2023‏ - Elsevier
Inconel® X-750 has been implanted with helium at a temperature of 400° C to obtain an
average concentration of [He] of about 3000 atomic parts per million (appm). The …

A transmission electron microscopy study of EBR-II neutron-irradiated austenitic stainless steel 304 and nickel-base alloy X-750

X Liu, L He, H Yan, M Bachhav, JF Stubbins - Journal of Nuclear Materials, 2020‏ - Elsevier
The microstructure of EBR-II neutron-irradiated austenitic stainless steel 304 and nickel-
base alloy X-750 was investigated. Both alloys were irradiated at low dose rates (∼ 2× 10 …

Deformation mechanism characteristics in a Ni-based alloy X-750: Dislocation/precipitate interaction

P Changizian, Z Yao, MR Daymond - Materials Characterization, 2021‏ - Elsevier
Transmission electron microcopy (TEM) analysis was employed to characterize the
deformation mechanisms in X-750 Ni-based superalloy. Both in-situ and ex-situ tensile tests …

[HTML][HTML] In-Plane Liftout and Push-to-Pull for In Situ Mechanical Testing of Irradiated Inconel X-750

LR Gomez-Hurtado, T Yao, F Teng, MD Matos… - Energies, 2024‏ - mdpi.com
A streamlined sample preparation method for nanomechanical testing is needed to improve
the quality of specimens, reduce the cost, and increase the versatility of specimen …

He bubble growth in nickel simulated by object kinetic Monte Carlo

K Ferasat, I Martin-Bragado, Z Yao… - Journal of Nuclear …, 2023‏ - Elsevier
When Ni-based alloys are exposed to neutron irradiation,(n, α) transmutation introduces
helium to the metal, leading to the formation of bubbles, which can severely affect the …

[HTML][HTML] Microstructure Characterization and Small Punch Test Analysis in Nickel-Based Alloy 617 by High Energy Neon Implantation

Y Shen, S Lv, Q Zhou, L Shi, L Sun, Z Li - Metals, 2022‏ - mdpi.com
Nickel-based alloys are good candidate structural materials for ultra-high temperature gas-
cooled reactors due to their excellent mechanical properties under high-temperature …

Effects of helium on irradiation-induced phase instability in a NiCrFeTiNbAl alloy

H Zhang, ZW Yao, MA Kirk - Tungsten, 2021‏ - Springer
Abstract The Ni–Fe–Cr based superalloy with percentage additions of Nb, Al and Ti, called"
Inconel X750 superalloy", is studied with its importance in nuclear application. Under reactor …