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  1. Article

    Open Access

    Numerical Interpretation of Hydrogen Thermal Desorption Spectra for Iron with Hydrogen-Enhanced Strain-Induced Vacancies

    We obtained thermal desorption spectra of hydrogen for a small-size iron specimen to which strain was applied during charging with hydrogen atoms. In the spectra, a shoulder-shaped peak in the high-temperature...

    Ken-ichi Ebihara, Yuri Sugiyama… in Metallurgical and Materials Transactions A (2021)

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    Chapter and Conference Paper

    Molecular Dynamics Simulations of Phosphorus Migration in a Grain Boundary of α-Iron

    Phosphorus causes steels embrittlement, which is considered to influence the ductile-brittle in reactor vessel steels. In order to develop a rate theory model for calculating based on atomistic proce...

    Ken-ichi Ebihara, Tomoaki Suzudo in TMS 2020 149th Annual Meeting & Exhibition… (2020)

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    Article

    First-Principles Study on the Grain Boundary Embrittlement of Metals by Solute Segregation: Part II. Metal (Fe, Al, Cu)-Hydrogen (H) Systems

    The microscopic mechanism of grain boundary (GB) embrittlement in metals by hydrogen segregation (trap**) has been not well understood for many years. From first-principles calculations, we show here that th...

    Masatake Yamaguchi, Ken-Ichi Ebihara… in Metallurgical and Materials Transactions A (2011)

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    Article

    Multiscale Modeling of Helium-Vacancy Cluster Nucleation under Irradiation: A Kinetic Monte-Carlo Approach

    We applied ab initio calculation and an object kinetic Monte Carlo modeling to the study of He-vacancy cluster nucleation under irradiation in bcc and fcc Fe, which are surrogate materials for ferritic/martens...

    Tomoaki Suzudo, Masatake Yamaguchi, Hideo Kabraki… in MRS Online Proceedings Library (2010)

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    Article

    Rate Theory Modeling of Irradiation-induced Phosphorus Segregation in FCC nickel Using First Principles Calculations

    We have evaluated phosphorus (P) segregation in ion-irradiated nickel (Ni) by the rate theory model incorporating the results of first principles calculations. We find from our first principles calculation tha...

    Ken-ichi Ebihara, Masatake Yamaguchi, Hideo Kaburaki… in MRS Online Proceedings Library (2009)