New approaches to understanding hydrogen embrittlement in steels

理解钢中氢脆的新方法

• 批准号: 2897405
• 金额: --
• 依托单位: Imperial College London
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2023
• 资助国家: 英国
• 起止时间: 2023 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2897405
• 关键词: New; approaches; understanding; hydrogen; embrittlement

The aim of the first project is to develop a fundamental understanding of hydrogen embrittlement in steels, using a variety ofcharacterisation techniques including cryogenic Focussed Ion Beam (FIB) and Atom Probe Tomography (APT).The anticipated major expansion in hydrogen production, transportation and utilisation calls for massive investments ininfrastructure. One of the biggest challenges of the hydrogen economy is storage and transport. Current hydrogen storagetechnology involves either physical storage systems such as pressurised canisters (typically made from steel, which may beembrittled by the cryogenic temperatures and hydrogen exposures- or the synergistic effects of both) or materials such ashydrides which can store hydrogen in a reacted form, that will then need to be extracted. Hydrogen embrittlement in steel atcryogenic temperatures is poorly understood - and the lack of mechanistic insights means that material selection or bespokealloy development remains challenging. Steels that are resistant to embrittlement at room temperature are certainly availablebut tend to be expensive, and their behaviour under cryogenic temperatures has not been well-explored. Improved fundamentalunderstanding of the processes of hydrogen dissolution in the metal, and the role of microstructural features that act ashydrogen trap sites, will assist in screening steels for hydrogen service. This iCASE project will therefore focus on theexperimental investigation of hydrogen dissolution, diffusion and distribution in different steels - with the steels studied andcharacterized under cryo-conditions. Using new experimental facilities at Imperial, we have a chance to create a step-changein understanding the properties.

第一个项目的目的是利用低温聚焦离子束 (FIB) 和原子探针断层扫描 (APT) 等多种表征技术，对钢中的氢脆有一个基本的了解。预计在氢气生产、运输和利用方面将出现重大扩展呼吁对基础设施进行大规模投资。氢经济的最大挑战之一是储存和运输。当前的储氢技术涉及物理存储系统，例如加压罐（通常由钢制成，可能会因低温和氢暴露或两者的协同效应而脆化）或材料，例如可以以反应形式存储氢的氢化物，然后需要提取。人们对钢低温下的氢脆现象知之甚少，而且缺乏机理见解意味着材料选择或定制合金开发仍然具有挑战性。在室温下抗脆化的钢当然是可用的，但往往很昂贵，而且它们在低温下的行为尚未得到充分研究。提高对金属中氢溶解过程的基本了解，以及作为氢陷阱位点的微观结构特征的作用，将有助于筛选用于氢服务的钢。因此，该 iCASE 项目将重点关注氢在不同钢中的溶解、扩散和分布的实验研究 - 在低温条件下对钢进行研究和表征。利用帝国理工学院的新实验设施，我们有机会在了解这些特性方面取得重大进展。