|About this Abstract
||7th World Congress on Integrated Computational Materials Engineering (ICME 2023)
||Microstructure-based Modelling Approach to Determine Hydrogen Diffusion and Trapping in Steels
||Maribel Arribas , Ana Rosa Carrillo , Ane Jimenez, Jean Baptiste Jorcin, Pello Uranga, Nerea Isasti
|On-Site Speaker (Planned)
In this work, a hydrogen diffusion and trapping model has been coupled with electrochemical permeation measurements to characterize de diffusion and trapping parameters associated with a pipeline steel. The obtention of hydrogen trapping parameters is not straightforward, especially for complicated microstructures with multiple trapping sites, and generally the existing models consider a high number of fitting parameters. In the present model, the number of fitting parameters has been reduced by defining new microstructure-based functions which give a physical meaning to parameters which have been typically treated as fitting parameters. As a result, a better estimation of the hydrogen diffusion and trapping parameters is obtained, providing an improved modelling framework for the definition of the appropriate microstructure features that result in a better performance of the pipeline steels in contact with hydrogen.