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Meeting 2026 TMS Annual Meeting & Exhibition
Symposium Verification, Calibration, and Validation Approaches in Modeling the Mechanical Performance of Metallic Materials
Presentation Title Modeling Hydrogen Influence on Ni201 Plastic Behavior and Validation Using In-Situ X-Ray Diffraction Microscopy Experimental Data
Author(s) Leonidas Zisis, Krzysztof S. Stopka, Marco Zambolin, Mohammad Imroz Alam, Zachary D. Harris , Michael D. Sangid
On-Site Speaker (Planned) Leonidas Zisis
Abstract Scope Hydrogen is a promising alternative to traditional fossil fuels due to its abundance, high energy density, and environmentally clean profile. However, its interaction with metals can significantly degrade their mechanical properties, hindering its widespread use. To address this, we introduce a hydrogen-sensitive plasticity model aimed at capturing the damage mechanisms induced by hydrogen exposure. This presentation outlines the methodology used to calibrate and validate the proposed model using a comprehensive suite of experimental datasets across varying hydrogen concentrations. These include a multi-objective optimization approach for calibration using coupon-based tests on both single-crystal and polycrystalline Ni201 specimens, as well as validation using High Energy X-ray Diffraction Microscopy (HEDM) data. By comparing the model predictions with experimental observations, we demonstrate the model’s capability to accurately capture hydrogen-induced degradation phenomena. This validation marks a critical step toward predictive modeling of Ni201 material behavior in hydrogen-rich environments.
Proceedings Inclusion? Planned:
Keywords Modeling and Simulation, Environmental Effects, Copper / Nickel / Cobalt

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