| Home | Organizers | Proceedings Editors | Proceedings Contributors | Search | | ||
|
|
|||
|
||||
|
|
||||
| Title: | STRUCTURAL-METALS CONSIDERATIONS FOR THE CONTAINMENT OF HIGH-PRESSURE HYDROGEN GAS | |
| DOI No: | 10.1142/9789812838025_0028 | |
| Source: | MATERIALS ISSUES IN A HYDROGEN ECONOMY (pp 299-308) | |
| Author(s): | C. SAN MARCHI
Sandia National Laboratories, 7011 East Ave, Livermore CA 94550, USA B. P. SOMERDAY Sandia National Laboratories, 7011 East Ave, Livermore CA 94550, USA K. A. NIBUR Sandia National Laboratories, 7011 East Ave, Livermore CA 94550, USA M. YIP Sandia National Laboratories, 7011 East Ave, Livermore CA 94550, USA |
|
| Abstract: | All engineering alloys are vulnerable to hydrogen-assisted fracture (hydrogen embrittlement) under some intersection of microstructural, mechanical, and environmental conditions, thus it is important to develop a comprehensive understanding of the service conditions for a given application. In addition, quantitative assessment of structural integrity aids the management of hydrogen-assisted fracture in structurally efficient components designed for high-pressure gaseous hydrogen. In this presentation, we describe two methods of assessing structural integrity: strength-based and fracture-control methodologies. The implications of these differing methods are briefly described in the context of hydrogen-assisted fracture. Strength-based methods lead to conservative designs based on indirect assessment of the hydrogen compatibility of materials, since hydrogen generally does not affect strength even in materials susceptible to hydrogen-assisted fracture. Fracture-control methods explicitly address failure mechanisms associated with existing defects, in particular crack extension in fatigue can be evaluated. These fracture control methods incorporate quantitative evaluation of materials properties (ie, resistance to hydrogen-assisted crack propagation) for establishing efficient structural design for hydrogen service. In general, engineering tools exist for quantitative assessment of structural integrity in high-pressure gaseous hydrogen environments using fracture control methodologies and these tools are being exploited in the engineering community. | |
| Full Text: | View full text in PDF format (179KB) | |
| TOC: | Back to Table of Contents | |
|
||