The materials and components compatibility program element applies Sandia’s core capability in hydrogen embrittlement to address fundamental questions about the mechanical behavior of materials when exposed to high-pressure gaseous hydrogen. The cornerstone of Sandia’s core capability in hydrogen embrittlement is the Hydrogen Effects on Materials Laboratory where specialized assets reside for conducting mechanical testing of materials with concurrent exposure to gaseous hydrogen at pressures from 1 MPa to greater than 100 MPa.
- Thermal Precharging – Materials and test specimens are exposed to high-pressure gaseous hydrogen (up to 140 MPa) at elevated temperature (up to 300 ˚C) before subsequent evaluation.
- Static-load Crack Growth Testing – Instrumented specimens subjected to constant-displacement loading (e.g., wedge-opening load specimens) are exposed to gaseous hydrogen at pressure up to 200 MPa and temperatures over the range of -70 ˚C to 170 ˚C. The material properties measured are the crack velocity and subcritical cracking threshold.
- Dynamic-load Testing – Specimens are exposed to gaseous hydrogen at pressure up to 140 MPa while concurrently subjected to different loading formats, e.g., monotonically increasing or cyclic. Material properties measured include tensile strength and ductility, fatigue strength, fatigue crack growth rates, and subcritical cracking thresholds under rising loading.
- optimize the reliability and efficiency of test methods for structural materials and components in hydrogen gas
- generate critical hydrogen compatibility data for structural materials to enable technology deployment,
- create and maintain information resources such as the “Technical Reference for Hydrogen Compatibility of Materials“, and
- demonstrate leadership in the international harmonization of standards for qualifying materials and components for service with high-pressure gaseous hydrogen.
Each of these objectives supports the development, optimization, or implementation of hydrogen containment codes and standards, such as ASME Article KD-10 for stationary and transport vessels, ASME B31.12 for piping and pipelines, CSA HPIT1 for industrial truck fuel systems, SAE J2579 for fuel systems in hydrogen vehicles, and CSA CHMC1 for hydrogen containment material qualification.