关于举行日本产业技术综合研究所Kiyoshi Yokogawa教授学术报告会的通知

发布时间:2021-10-14设置

报告1题目:Hydrogen Safety—Part 1Basic science of hydrogen embrittlement

报告2题目:Hydrogen Safety—Part 2Prevention of hydrogen embrittlement

报 告 人:Prof.Kiyoshi Yokogawa(日本产业技术综合研究所)

报告时间:20211022日下午14:3016:301029日下午14:3016:30

会议方式:腾讯会议(会议号:440 314 221

欢迎广大师生踊跃参加。

  

  

机械与汽车工程学院

20211014

  

  

报告1摘要:

Hydrogen energy is expected to improve the climate of the Earth. New hydrogen technology, in particular fuel cell vehicle (FCV) using high-pressure hydrogen storage, is developed.  Hydrogen embrittlement (HE) of metallic materials to be used in hydrogen production, storage, transportation and utilization is important for public safety of not only hydrogen energy industry but also current chemical industry, oil refinery and ammonia synthesis using hydrogen. HE was discovered in 19th century, since then, many studies have been conducted. HE is classified into 3 categories, one is internal reversible HE, another is hydrogen gas embrittlement, the other is hydrogen reaction embrittlement. HE evaluation methods, i.e. mechanical testing, hydrogen diffusion, hydrogen analysis, and computational calculations are shown with our experiences.Based on these studies, several HE mechanisms have been proposed.Main mechanisms, i.e. hydrogen-enhanced localized plasticity theory (HELP) and hydrogen-enhanced strain-induced vacancy theory (HESIV) are described in details.

  

氢能有望改善地球气候。开发了新的氢技术,特别是使用高压储氢的燃料电池汽车(FCV)。研究用于氢的生产、储存、运输和利用金属材料的氢脆效应(HE)不仅对氢能源行业的公共安全,而且对当前的化学工业、炼油厂和使用氢气的合成氨的公共安全都具有重要意义。氢脆现象于19世纪被发现,此后进行了许多相关研究。氢脆分为三类,内部可逆氢脆、氢反应脆化和环境氢脆。氢脆的评估方法有机械测试、氢扩散、氢分析和模拟仿真计算,这些我们都有丰富的经验。基于这些研究,目前已经提出了几种氢脆机制,即氢促进局部塑性变形理论(HELP)和氢吸附诱导位错发射理论(HESIV),在报告中将详细解释这几种机制。

  

报告2摘要:

Fuel cell vehicle (FCV) is developed and commercially available in the market. FCV uses high-pressure hydrogen storage tank on board and hydrogen station also supplies high-pressure hydrogen into FCV. Application of HE for FCV and hydrogen station to prevent the accidents is discussed, i.e. hydrogen compatibility and hydrogen suitability are introduced to establish the mechanical design for high-pressure hydrogen storage.

Hydrogen has been used in current chemical industry, oil refinery and ammonia synthesis from early 20th century.Many accidents have occurred in the industries, thus the application of HE is discussed to prevent the accidents, i.e. Nelson diagram for hydrogen attack and the strength limit of the component materials for delayed fracture are described in details.

  

如今氢燃料电池汽车(HFCV)已被大量开发并在市场上销售。氢燃料电池汽车使用车载高压储氢罐,其高压氢气一般由加氢站供应。本报告将讨论燃料电池汽车和加氢站的氢脆现象在事故预防中的应用,即引入氢相容性和氢适用性,建立并完善高压储氢容器结构设计。从 20世纪初开始,氢气已用于当前的化学工业、炼油厂和合成氨。在工业生产中已经发生了很多相关事故,因此本报告将讨论氢脆预防相关研究在事故预防中的应用,例如基于Nelson曲线的材料氢致滞后断裂预防。

  

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。


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