|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Materials Processing Fundamentals
||Multiscale Modelling of Hydrogen Transport in Martensitic Steels
||Andrej Turk, David Bombac, Enrique Galindo-Nava, Pedro Rivera-Diaz-del-Castillo
|On-Site Speaker (Planned)
A new methodology for hydrogen transport and trapping in Fe-C martensite is proposed. The hierarchical structure of lath martensite is elucidated and is used to obtain the dislocation density, precipitate distribution and block/packet boundary density in a prior austenite grain. These microstructural features are used to describe transport and trapping of diffusing hydrogen atoms. The model is solved with input parameters obtained from atomistic quantum calculations in tandem with kinetic Monte Carlo simulations. This includes trap binding energies, trapping occupancies and effective diffusivities for each microstructural feature. We assess the effects of microstructure in hydrogen ingress and effusion under various processing conditions.
||Planned: EPD Congress Volume