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  1. Article

    Open Access

    Cleavages along {110} in bcc iron emit dislocations from the curved crack fronts

    Body-centered-cubic (bcc) transition metals, such as \(\alpha \) α -Fe and W...

    Tomoaki Suzudo, Ken-ichi Ebihara, Tomohito Tsuru, Hideki Mori in Scientific Reports (2022)

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  2. 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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  3. No Access

    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)

  4. No Access

    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)

  5. No Access

    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)

  6. No Access

    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)

  7. No Access

    Chapter and Conference Paper

    Multi-scale Modeling of Crack Propagation

    Structural materials inside a nuclear reactor are subjected to contact with high-temperature coolant water, and after several decades of operation, cracks begin to grow in these materials which are otherwise ...

    Mitsuhiro Itakura, Hideo Kaburaki… in High Performance Computing on Vector Syste… (2009)