Nayem Ahmed

Ph.D

Petroleum Engineering

University of Oklahoma

Research Assistant

• Commissioned a pilot-scale system to assess the applicability of API 5L X52, X60, and X70 pipeline materials for hydrogen transportation, focusing on performance under high-pressure conditions. • Constructed in-situ aging system to simulate realistic operational degradation of hydrogen-compatible pipeline steels, enabling long-term reliability assessment. • Conducted tensile and fatigue testing under high-pressure hydrogen environments to evaluate pipeline integrity, fracture behavior, and compatibility, using ASTM E1820, ASTM E647, and ASTM E8/E8M standards. • Performed microstructural characterization of vintage API steels and conducted Scanning Electron Microscopy (SEM) analysis of fracture surfaces to investigate hydrogen-assisted fatigue and fracture mechanics. • Improved correlations between operating parameters (pressure, temperature, microstructure) and pipeline material response to enhance compliance with API 5L and ASTM material standards. • Led techno-economic analysis of hydrogen storage and transportation infrastructure to evaluate commercial feasibility and guide infrastructure investment decisions. • Developed machine learning models to predict hydrogen embrittlement, fatigue crack growth, and service lifetime of pipelines, integrating mechanical and materials-based features into predictive frameworks.