|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Advanced High-Strength Steels
||Ab-initio Investigation of the Interaction of Hydrogen with Carbides in Advanced High-strength Steels
||Poulumi Dey, Tobias A. Timmerscheidt, Jörg von Appen, Tilmann Hickel, Richard Dronskowski, Jörg Neugebauer
|On-Site Speaker (Planned)
Controlling the role of hydrogen in advanced high-strength steels is decisive for their application in automotive industry. Ab initio calculations can provide pathways to adjust the amount of trapping sites by modifying the chemical composition of the steels. Here, we focus on the role played by homogeneously distributed nano-sized precipitates of κ carbides in Al-rich high strength steels. The analysis based on density functional theory (DFT) reveals that the C concentration is a decisive parameter for the solubility of hydrogen inside the carbides as well as in the interface to the austenitic matrix. The hydrogen solubility, kinetics and its impact on the strength of the interface is compared to the situation in other carbides, in order to assess the role of κ carbides for the hydrogen embrittlement of these steels.
||Planned: Supplemental Proceedings volume