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| Content Provider | The American Society of Mechanical Engineers (ASME) Digital Collection |
|---|---|
| Author | Mori, Hiroaki Kayano, Rinzo Ogiwara, Hiroyuki Saida, Kazuyoshi Nishimoto, Kazutoshi |
| Copyright Year | 2013 |
| Abstract | Numerical analysis of hydrogen distributions in the welds of stainless clad steels, which are the structural material of hydrogen storage pressure vessels, was conducted to predict the hydrogen embrittlement in the pressure vessels. The theoretical model for the calculation was based on the activity of hydrogen considering residual stresses induced by welding and hydrogen accumulating sites such as precipitates and dislocations. From the calculations, hydrogen concentrates at the center of weld metals in both of longitudinal and circumferential directions in welded joints of stainless clad steels. However, the hydrogen contents were much lower than those in the carbide layers, in which are observed in steels with weld overlay of stainless steels, as the calculation of hydrogen distribution in the materials using the higher evaluated diffusion coefficient of hydrogen with considering margin of safety. Therefore, it seemed that the risk of cold cracking due to hydrogen embrittlement was sufficiently lower in the welds of stainless clad steels during many cycles of shutdown and restart of the pressure vessels in long-term operation. |
| Sponsorship | Pressure Vessels and Piping Division Nondestructive Evaluation Engineering Division |
| File Format | |
| ISBN | 9780791855713 |
| DOI | 10.1115/PVP2013-97812 |
| Volume Number | Volume 6B: Materials and Fabrication |
| Conference Proceedings | ASME 2013 Pressure Vessels and Piping Conference |
| Language | English |
| Publisher Date | 2013-07-14 |
| Publisher Place | Paris, France |
| Access Restriction | Subscribed |
| Subject Keyword | Overlays (materials engineering) Cracking (materials) Cycles Hydrogen storage Welding Hydrogen Metals Risk Residual stresses Steel Diffusion (physics) Dislocations Welded joints Fracture (process) Numerical analysis Pressure vessels Stainless steel Safety Hydrogen embrittlement |
| Content Type | Text |
| Resource Type | Article |
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