Positron annihilation spectroscopic study of intrinsic and ion-irradiation induced vacancy defects in Zr-containing ODS steels with and without Al

S Mohan, R Ramachandran, C David… - Journal of Alloys and …, 2022 - Elsevier
The oxide dispersion strengthened (ODS) ferritic steels containing Zr are synthesized with
and without Al addition and found to possess homogeneous distribution of nanoprecipitates …

Helium self-trapping and diffusion behaviors in deformed 316L stainless steel exposed to high flux and low energy helium plasma

Y Gong, S Jin, T Zhu, L Cheng, X Cao, L You… - Nuclear …, 2018 - iopscience.iop.org
A large number of dislocation networks were introduced in to 316L stainless steel by cold
rolling. Subsequently, low energy (40 eV) helium ions were implanted by exposing the steel …

Influence of nanochannel structure on helium-vacancy cluster evolution and helium retention

W Qin, S Jin, X Cao, Y Wang, P Peres, SY Choi… - Journal of Nuclear …, 2019 - Elsevier
In the fusion reactors, plasma facing materials (PFMs) will be bombarded by large amounts
of energetic particles, including helium (He) atoms. These metal-insoluble He atoms are …

Study of defect complexes and their evolution with temperature in hydrogen and helium irradiated RAFM steel using positron annihilation spectroscopy

R Ramachandran, C David, P Magudapathy… - Fusion Engineering and …, 2019 - Elsevier
The formation of hydrogen and helium associated defect complexes and their influence on
the nucleation and growth of helium bubbles in Indian Reduced Activation …

Development of Advanced Nuclear Structural Materials for Sustainable Energy Development

D Srivastava, K Kapoor, G Amarendra - Journal of the Indian Institute of …, 2022 - Springer
Structural materials used in nuclear reactors face many challenges due to elevated
temperature operation, high neutron flux induced transmutations and radiation damage. In …

Near-surface investigation of positron diffusion length in helium-implanted Fe9Cr and its ODS variant

J Degmová, V Kršjak, T Shen, JŠ Veterniková… - Applied Surface …, 2021 - Elsevier
In the present paper, we employ the depth sensitive slow positron Doppler broadening
technique to characterise the positron diffusion in various near-surface layers of He+ …

[HTML][HTML] Study of irradiation-induced vacancy-type defects in tungsten using positron annihilation spectroscopy

R Ramachandran, S Balaji - Nuclear Materials and Energy, 2023 - Elsevier
Tungsten has been considered as a potential candidate material for the application of
plasma-facing components in magnetic confinement fusion reactors. Fusion neutrons …

[HTML][HTML] Mechanical and helium swelling responses of K-RAFM steels to Fe ion irradiation and helium implantation

S Kim, M Ahn, J Park, G Yu, J Kim, HH Jin, C Lee… - Nuclear Materials and …, 2024 - Elsevier
This study explores the effects of Fe ion irradiation and helium implantation on the
mechanical and microstructural behaviors of K-RAFM steels. Through micropillar …

High-temperature radiation damage studies of Reduced Activation Ferritic/Martensitic (RAFM) steel at fusion relevant He/dpa ratio using positron beam based Doppler …

R Ramachandran, S Julie, R Rajaraman… - Journal of Nuclear …, 2021 - Elsevier
High-temperature irradiation damage studies of Indian Reduced Activation
Ferritic/Martensitic (INRAFM) steel have been carried out at doses relevant to fusion reactor …

Study of vacancy defects and their thermal stability in MeV Fe ion irradiated RAFM steel using positron beam Doppler broadening spectroscopy

R Ramachandran, S Chakravarty, S Balaji… - Philosophical …, 2019 - Taylor & Francis
Indian reduced activation ferritic-martensitic steel was irradiated with 1.1 MeV Fe ions to
various doses from 1 to100 dpa at room temperature. The depth profiling of irradiation …