Hydrogen Embrittlement - NASA

This Technical Memorandum was originally prepared as an Annex on the topic of Hydrogen Embrittlement for the AIAA Guide to Safety of Hydrogen and Hydrogen Systems (G-095-2004), then in revision [1]. The Guide establishes a uniform NASA process for hydrogen system design, materials selection operation, storage and transportation, and represents a broad collection of aerospace acumen. In the years since the Guide’s initial publication the understanding of fracture growth, an important mechanism involved with hydrogen embrittlement, increased greatly, bringing a need for the addition of substantial new material. This revision proved too long for an annex to the Guide, and was deemed better suited as a separate publication. While this Technical Memorandum does stand as a separate document, its purpose can be enhanced if used as a companion to the Guide.