Open AccessIon irradiation-induced the radiation hardening in Fe and Fe-0.3Si alloys
Author(s) -
Phongsakorn Prak Tom,
Kenta Murakami,
Vu Nhut Luu
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/785/1/012027
Subject(s) - nanoindentation , irradiation , indentation , materials science , hardening (computing) , helium , ion , indentation hardness , vacancy defect , radiation hardening , composite material , metallurgy , atomic physics , crystallography , microstructure , nuclear physics , chemistry , physics , layer (electronics) , organic chemistry
Depth profile of Helium irradiation effects in reactor pressure vessel (RPV) model material is identified using a nano-indentation technique in order to develop a new methodology to clarify the solute-vacancy interaction. 2 MeV He ion was irradiated in pure iron at room temperature with and without an energy degrator. The indentation hardness was measured by nanoindentation changing the load at 9 levels. Hardening in irradiated materials was clearly observed in all indentation loads as well as the well-known indentation size effect. It was interesting that the significant increase of hardness was recognized at 0.8 μm depth, which is corresponding to the obstacle of deformation at 3˜4 μm depth, that would be the cause of helium implantation. Furthermore, dose effects on 3MeV Si irradiated RPV model materials were confirmed.