About this Abstract |
| Meeting |
11th Conference on Trends in Welding Research + Additive Manufacturing (TWR+AM)
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| Symposium
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11th Conference on Trends in Welding Research + Additive Manufacturing (TWR+AM)
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| Presentation Title |
Microstructural Evolution and Creep Performance of SA516 Weldments by High-temperature High-pressure Hydrogen Attack |
| Author(s) |
Xuesong Fan, Yanli Wang, Wei Zhang, Brad Hall, Jeremy L. Moser, Andres Marquez Rossy, Yiyu Wang, Jorge A. Penso, Zhili Feng |
| On-Site Speaker (Planned) |
Xuesong Fan |
| Abstract Scope |
High-temperature hydrogen attack (HTHA) significantly impacts industries such as oil/gas, chemical refining, and power generation, with welded regions of structural steels being particularly vulnerable. Understanding the microstructural and metallurgical behaviors of welded structures is critical for predicting their performance and life under HTHA. This study investigates creep and failure behaviors and underlying hydrogen damaging mechanisms in multi-pass weldments of SA516-Grade70 steel under high-temperature high-pressure hydrogen environment representative of service scenarios, with emphasis on the influence of welding-induced microstructural heterogeneity. Cross-weld tubular specimens were fabricated from gas metal arc welded (GMAW) SA516 plates and exposed to internally pressurized hydrogen environment. A purposely built in-situ creep testing system was used with high-temperature digital image correlation (DIC) enabling real-time localized strain tracking across base metal, heat-affected zone, and weld metal regions. X-ray computed tomography (X-CT) coupled with high-resolution microscopy revealed hydrogen-induced and creep damage morphologies as well as microstructural degradation in the materials. |
| Proceedings Inclusion? |
Undecided |