报告1题目: Hydrogen Safety in Carbon Neutrality—Part 1: Hydrogen Energy (碳中和背景下的氢安全-第一节：氢能源)
报告2题目：Hydrogen Safety in Carbon Neutrality—Part 2: Hydrogen Embrittlement (碳中和背景下的氢安全-第二节：氢脆)
报 告 人：Prof. Kiyoshi Yokogawa（日本产业技术综合研究所）
报告1时间：2023年1月16日下午14:30~17:00
报告2时间：2023年1月30日下午14:30~17:00
会议方式：腾讯会议（会议号: 671 4487 8889）
欢迎广大师生踊跃参加!
机械与汽车工程学院
2023年1月12日
报告1摘要：
Increase of the content of carbon dioxide has been changing the climate of the Earth, warm climate of the Earth, and then we have experienced glacier disappearance, severe storm, increase of sea level, etc. as the results. Carbon neutrality has been proposed in COP26 based on Paris Agreement of COP21 and many countries approve of the carbon neutrality by 2050. Hydrogen energy is expected to contribute the carbon neutrality. Hydrogen production of green, grey (gray) and blue hydrogens, transportation, storage and utilization are introduced. Fuel cell vehicles (FCV), which have been commercially available in the market, are expected as a new technology of hydrogen energy using high-pressure hydrogen storage. Current development of FCV with the component of fuel cell on board, high-pressure hydrogen tanks on board and high-pressure hydrogen storage in hydrogen station is described in details.
报告2摘要：
Hydrogen embrittlement (HE) of metallic materials to be used in not only hydrogen energy including FCVs but also in current hydrogen industry is the most important for public safety. HE was discovered in 19th century, and since then many accidents have occurred in the industries, thus the basic science of HE to propose a mechanism of HE and the application of HE based on hydrogen compatibility and hydrogen suitability for hydrogen service have been conducted. HE evaluation methods, i.e., mechanical testing, hydrogen diffusion, hydrogen analysis, and computational calculations, are shown with our experiences. Two main HE mechanisms, brittle fracture model of HE and plasticity-dominated fracture model of HE, have been proposed. Guide line to use the metallic materials for HE regulated by the industrial standards and/or the responsible institute for public safety is described in details.
报告人简介：
Kiyoshi Yokogawa，博士，日本产业技术综合研究所教授，是国际顶级的氢脆专家，取得了一系列处于国际领先水平的研究成果：首次发现氢致微裂纹起源于应变诱导马氏体富集区和奥氏体富集区的边界，而非传统认为的应变诱导马氏体，为揭示亚稳态奥氏体不锈钢的氢脆机理奠定了重要基础；基于分子动力学，建立了高压氢气环境中Ni基金属材料的塑性变形分析模型；首次发现石墨化炭纳米结构的环状超结构和5 圆环原子图像，揭示了炭纳米纤维的结构。多次应邀到美国、德国、韩国讲学。在国际刊物发表高水平论文110余篇，获授权专利12项（其中美国专利3项，日本专利9项），出版相关专著6本。获日本金属学会突出贡献奖、韩国机械学会突出贡献奖。
