Hydrogen-assisted fracture resistance of pipeline welds in gaseous hydrogen
| Autor: | Joseph A. Ronevich, Eun Ju Song, Brian P. Somerday, Christopher W. San Marchi |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Yield (engineering)
Materials science Hydrogen Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology Welding 010402 general chemistry 01 natural sciences Gas metal arc welding law.invention Electrical resistance and conductance law Residual stress Composite material Base metal Renewable Energy Sustainability and the Environment technology industry and agriculture respiratory system 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences Fuel Technology chemistry Fracture (geology) 0210 nano-technology |
| Zdroj: | International Journal of Hydrogen Energy. 46:7601-7614 |
| ISSN: | 0360-3199 |
| DOI: | 10.1016/j.ijhydene.2020.11.239 |
| Popis: | Fracture resistance of pipeline welds from a range of strength grades and welding techniques was measured in air and 21 MPa hydrogen gas, including electric resistance weld of X52, friction stir weld of X100 and gas metal arc welds (GMAW) of X52, X65 and X100. Welds exhibited a decrease in fracture resistance in hydrogen compared to complementary tests in air. A general trend was observed that fracture resistance in 21 MPa hydrogen gas decreased with increasing yield strength. To accommodate material constraints, two different fracture coupon geometries were used in this study, which were shown to yield similar fracture resistance values in air and 21 MPa hydrogen gas; values using different coupons resulted in less than 15% difference. In addition, fracture coupons were removed from controlled locations in select welds to examine the potential influence of orientation and residual stress. The two orientations examined in the X100 GMAW exhibited negligible differences in fracture resistance in air and, similarly, negligible differences in hydrogen. Residual stress exhibited a modest influence on fracture resistance; however, a consistent trend was not observed between tests in air and hydrogen, suggesting further studies are necessary to better understand the influence of residual stress. A comparison of welds and base metals tested in hydrogen gas showed similar susceptibility to hydrogen-assisted fracture. The overall dominant factor in determining the susceptibility to fracture resistance in hydrogen is the yield strength. |
| Databáze: | OpenAIRE |
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