A5003252211- Hydrogen embrittlement and corrosion behaviors in metals
- Fatigue and fracture mechanics
- Material Properties and Failure Mechanisms
- Microstructure and Mechanical Properties of Steels
- Mechanical Failure Analysis and Simulation
- Engineering Diagnostics and Reliability
- Nuclear Materials and Properties
- Spacecraft and Cryogenic Technologies
- Welding Techniques and Residual Stresses
- Corrosion Behavior and Inhibition
- Non-Destructive Testing Techniques
- Offshore Engineering and Technologies
- Combustion and Detonation Processes
- Hybrid Renewable Energy Systems
- Nuclear and radioactivity studies
- Graphite, nuclear technology, radiation studies
- Metal Alloys Wear and Properties
- Risk and Safety Analysis
- Engineering Applied Research
- Metal and Thin Film Mechanics
- Fusion materials and technologies
- Structural Integrity and Reliability Analysis
- Recycling and Waste Management Techniques
- Engineering Structural Analysis Methods
- Geotechnical Engineering and Underground Structures
Sandia National Laboratories
2022-2024
Sandia National Laboratories California
2015-2024
Colorado School of Mines
2010-2012
Tensile specimens of 10B22 (22MnB5) sheet steels were austenitized, quenched to martensite, and tempered at temperatures between 150 520°C for various times. The heat treated charged with 1.7 ppm hydrogen immediately tested. Fracture surfaces examined by field emission scanning electron microscopy. As-quenched martensitic exhibited the most severe embrittlement failed stress-controlled cleavage fracture low stresses. initiation hydrogen-induced in 350°C was consistent glide plane decohesion,...
Abstract The effects of internal hydrogen on the deformation microstructures 304L austenitic stainless steel have been characterized using electron backscattered diffraction (EBSD), transmission Kikuchi (TKD), high-resolution scanning microscopy (HRSTEM), and nanoprobe diffraction. Samples, both thermally precharged with without thermal precharging, were subjected to tensile 5 20 pct true strain followed by multiple microscopic interrogations. Internal produced widespread stacking faults...
Abstract The objective of this work was twofold: (1) measure reliable fatigue crack growth relationships for X65 steel and its girth weld in high-pressure hydrogen gas to enable structural integrity assessments pipelines, (2) evaluate the accelerated susceptibility fusion zone heat-affected relative base metal. Fatigue (da/dN versus ΔK) were measured welded pipeline high pressure (21 MPa) air. Hydrogen assisted observed metal (BM), (FZ), (HAZ), manifested through rates reaching nearly an...
Reducing hydrogen embrittlement in the low-cost Fe─C based steels have potential to significantly impact development of energy technologies. Molecular dynamics studies interactions with provide fundamental information about behavior at microstructural length scales, although such not been performed due lack an Fe─C─H ternary interatomic potential. In this work, literature on potentials related systems are reviewed aim constructing from published binary potentials. We found that Fe─C, Fe─H,...
Abstract The design of pressure vessels for high-pressure gaseous hydrogen service per ASME Boiler and Pressure Vessel Code Section VIII Division 3 requires measurement fatigue crack growth rates in situ at the pressure. These measurements are challenging only a few laboratories world equipped to make these measurements, especially excess 100 MPa. However, sufficient data is now available show that common vessel steels (e.g., SA-372 SA-723) similar when maximum applied stress intensity...