|About this Abstract
||MS&T22: Materials Science & Technology
||Steels for Sustainable Development
||Through Thickness Microstructural Features for Optimum Ductility Performance In High Pressure Gaseous Hydrogen Pipelines
||Douglas Stalheim, Andrew Slifka, Aaron Litschewski
|On-Site Speaker (Planned)
Hydrogen as an energy source, transported by either existing or new pipelines, to combat climate change is gaining momentum around the world. Significant degradation of key ductility properties of fracture toughness and fatigue crack growth rate of an API carbon steel pipeline in the presence of higher-pressure gaseous hydrogen has been well documented. Ductility performance is controlled by through thickness microstructural attributes. There are characteristics observed in API pipeline steels tested for fracture toughness and fatigue crack growth that suggest some through thickness microstructures perform better than others with increasing hydrogen pressure. In the data analysis done to date in these API pipeline steels some microstructural attributes observed show a more improved/stable fracture toughness and fatigue ductility performance up to 21 MPa hydrogen pressure. This presentation will discuss the observed common through thickness microstructure features in API steels that result in optimum ductility performance in high pressure gaseous hydrogen applications.