脱炭素エネルギー先導人材育成フェローシップ 2022年度
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wolleRedarce君は、安全・安心な水素社会の構築に不可欠な金属材料の水素脆化対策に取り組んでいます。150年以上にわたり研究が続いている未解決問題にデータ科学的手法によりアプローチすることで、低コスト・高強度で十分な耐水素性を有する材料の開発と実用化にブレークスルーをもたらすことを目指しています。構造材料研究とデータ科学の融合について確立された研究手法はありません。旧来の手法にとらわれず、自由な発想で新風を吹き込み、将来、水素安全利用の分野で日本-欧州の懸け橋になっていただけることを期待しています。Q-Energy Innovator Fellowship15工学府水素エネルギーシステム専攻博士後期課程2年工学研究院 教授Hydrogen is promised an important future especially consid-ering its environmental friendliness when converting its energy and will highly contribute to the transition from fossil fuels to “clean” energy.The transition to renewable energy has been an important topic over the years and is one of the key parts of sustainable de-velopment. Nowadays, more than 80% of the world total energy production comes from fossil fuels sources, not from renewable energy, which highly contributes to the emission of greenhouse gases. Renewable energies have a crucial role in limiting these emissions by replacing non-renewable resources as a mean of producing energy in a more environmentally friendly way. Hy-drogen technology is progressively answering to this demand thanks to the increase of funding, research, and interest it has gained across the years. Hydrogen as the possibility to become the primary form of energy carrier but it comes with limits as it needs to be produced, contained, and transported.To remain an attractive alternative, cheaper materials are nec-essary for structural components. Low-alloy steels are a neces-sary choice for storage regarding their price and compatibility with hydrogen but unfortunately, knowledge on the degradation of strength properties when subjected to a hydrogen-rich envi-ronment, so-called hydrogen embrittlement, is still lacking. Some consequences have been documented, but proper characteriza-tion remains to be made.Components that will be subjected to hydrogen environment follow “strength-based design”. They are first designed on safe-ty, then on serviceability. Fatigue crack growth is important for strength design of high-pressure gas components. For instance, fatigue crack growth life can be used as a limit for estimating total fatigue life, especially when failure of the component is not di-rectly visible such as a leakage. Materials with higher strength and lower cost are strongly requested by the industry. Creating such a material will be ben-eficial for both the development of hydrogen society by allowing higher-capacity and safer high-pressure vessels and industries by reducing material cost.The aim of the research is to find a solution to prevent the rela-tive fatigue crack growth rate from increasing while improving the tensile strength. The research will focus on evaluating micro-structures rather than changing the chemical composition of the material.指導教員からメッセージEnergy Week2023 Poster session松永 久生Breakthrough of 900MPa barrier of fatigue crack growth resistance in BCC steels in high-pressure hydrogen environmentTowards the adoption of lower-cost and higher-strength steels for high-pressure hydrogen environmentTimothee Redarce10f

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