Naoyuki Hashimoto

TL;DR: A window type of the environmental cell system for a high-voltage electron microscope was developed and applied to in situ observation of a palladium (Pd) thin film, and the lattice fringes were clearly distinguished and the dislocation behavior during Pd hydrogenation was easily recognized according to the corresponding inverse fast fourier transform images.

TL;DR: In this paper, the synergistic effect of displacement damage and helium generation under neutron irradiation on tensile behavior and microstructures of austenitic stainless steels was investigated, and it was shown that the main factors of radiation hardening in the spectrally-tailored (ST) Oak Ridge research reactor/high flux isotope reactor (ORR/HFIR) capsule to 17 dpa with a helium production of about 200 appm and in the HFIR target capsule to 21 and 34 DPA with 1590 and 2500 appm He, respectively.

TL;DR: In this article, a TIG weld joint of F82H exhibited low irradiation hardening in a tensile test, compared to the base metal, based on the phase diagram and grain size.

TL;DR: In this paper, the depth dependence of hardness in ion-irradiated 316 stainless steel was evaluated by the sectioning of damaged region and subsequent nano-indentation, which was supplementarily investigated by transmission electron microscopy.

TL;DR: In this paper, a review of recent molecular dynamics and transmission electron microscopy results on irradiated metallic materials is presented, with an emphasis on defect production in the displacement cascade and the fluence and temperature-dependent accumulation of defect clusters.