New Approaches to Understanding Hydrogen Embrittlement of Steels

了解钢氢脆的新方法

• 批准号: 2790946
• 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-2790946
• 关键词: New; Approaches; Understanding; Hydrogen; Embrittlement

The anticipated major expansion in hydrogen production, transportation and utilisation calls for massive investments in infrastructure. One of the biggest challenges of the hydrogen economy is storage and transport. Current hydrogen storage technology involves either physical storage systems such as pressurised canisters (typically made from steel, which may be embrittled by the cryogenic temperatures and hydrogen exposures- or the synergistic effects of both) or materials such as hydrides which can store hydrogen in a reacted form, that will then need to be extracted. Hydrogen embrittlement in steel at cryogenic temperatures is poorly understood - and lack of mechanistic insights means that material selection or bespoke alloy development remains challenging. Steels that are resistant to embrittlement at room temperature are certainly available but tend to be expensive, and their behaviour under cryogenic temperatures has not been well-explored. Improved fundamental understanding of the processes of hydrogen dissolution in the metal, and the role of microstructural features that act as hydrogen trap sites, will assist in screening steels for hydrogen service. This iCASE project will therefore focus on the experimental investigation of hydrogen dissolution, diffusion and distribution in different steels - with the steels studied and characterized under cryo-conditions. Using new experimental facilities at Imperial, we have a chance to create a step-change in understanding of the properties. The experimental work will be supported by numerical modelling, leading to a workflow for characterising candidate steels for hydrogen service.

预计氢生产、运输和利用的大幅扩张需要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。目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，例如氢化物，可以将氢存储在反应后的氢罐中。形式，然后需要将其提取。人们对低温下钢中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以及作为氢陷阱位点的微观结构特征的作用的基本了解，将有助于筛选用于氢服务的钢材。因此，该 iCASE 项目将重点关注不同钢中氢溶解、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，我们有机会在对这些特性的理解上发生重大变化。实验工作将得到数值模型的支持，从而形成用于表征氢服务候选钢的工作流程。