|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Interface-driven Phenomena in Solids: Thermodynamics, Kinetics and Chemistry
||Assessing the Effect of Hydrogen on Slip Transmission across Grain Boundaries in α-Fe
||Ilaksh Adlakha, Kiran Solanki
|On-Site Speaker (Planned)
Grain boundaries (GBs) play a fundamental role in the strengthening mechanism acting as an impediment to the dislocation motion. However, the presence of an insurmountable barrier for a dislocation can generate slip localization that could lead to intergranular failure. The presence of an aggressive environment increases the susceptibility to intergranular fracture. However, there is a lack of systematic investigations exploring the role of corrosive environment on the dislocation-GB (DGB) interactions. In this work, the effect of hydrogen on the interactions between the screw dislocation and <111> tilt GBs in α-Fe was examined. Our simulations reveal that the outcome of the DGB interaction depends strongly on the underlying GB dislocation network. Further, there exists a strong correlation between the GB energy and the energy barrier for slip transmission. Finally, it was found that the presence of hydrogen increases the strain energy stored within the GB which could lead to intergranular failure.
||Planned: A print-only volume