|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Deformation and Transitions at Interfaces
||Hydrogen Embrittlement and Grain Boundary Fracture in Nickel: A Perspective from Atomistic Simulations
||Douglas E Spearot, Remi Dingreville, Doruk Aksoy
|On-Site Speaker (Planned)
The most challenging issue regarding hydrogen embrittlement is associated with the convolutions and interactions between mechanisms that cause hydrogen-induced intergranular fracture. In this presentation, a statistical approach combined with molecular dynamics simulations is used to study the influence of hydrogen on intergranular decohesion. In order to isolate the role of hydrogen effects on the natural strength of the grain boundary, bicrystal systems are carefully selected based on their mechanical attributes and compatibility (elastic impedance, Schmid factors) across the grain boundary interface. The influence of hydrogen segregation on the grain boundary strength and work of separation will be discussed in terms of both the grain boundary structure and mechanical characteristics for sets of grain boundaries.