RESEARCH

In preparation for the forthcoming commercialization and subsequent world-wide adoption of fuel-cell vehicles and hydrogen stations, a specialized set of components (e.g., vessels, valves, regulators and metering devices) is being developed for the handling of high-pressure hydrogen gas. It is well known that hydrogen easily penetrates into the materials and causes so-called “hydrogen embrittlement (HE)”. The degree of susceptibility of materials to HE greatly influences their possible selection and qualification for use with high-pressure hydrogen gas. We are tackling the deeper understanding of HE mechanism of various metallic materials to be used for the high-pressure hydrogen systems. The research results will contribute to the establishment of novel design guidance and reasonable regulation review, realizing the adoption of lower cost materials without sacrificing safety.

・Multiscale observation of hydrogen embrittlement behavior for the development of high-strength hydrogen compatible materials
・Hydrogen influence on the fatigue strength properties of additive manufactured Ni-based superalloy 718
・Effect of Solute Hydrogen on Tensile Deformation and Fracture Behavior of Pricipitation-Hardened Iron-Based Superalloy A286
・Effect of load waveform on fatigue crack growth behavior of metastable austenitic stainless steel under hydrogen environment
・Elucidation of the microscopic mechanism of hydrogen-assisted fatigue crack propagation in high-strength martensitic steels
・Multi-scale analysis of the hydrogen embrittlement fracture of austanitic stainless steel welds
・Evolution behavior of fracture mechanistic plastic zone during fatigue crack propagation process in gaseous hydrogen
・Fatigue properties of nickel based superalloys
・Effect of pearlite lamellar structure on fatigue crack growth properties of carbon steels in gaseous hydrogen environment
・Hydrogen Embrittlement behavior of Alloy 718
・Temperature dependence of hydrogen-introduced fatigue crack growth acceleration in pure iron

・Effect of Microstructure on Torsional Fatigue Limit in Bainitic Steels
・Fatigue strength properties of Ni based superalloy Alloy718 under tensile-compressive and torsional loading



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