|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Deformation and Transitions at Interfaces
||Intergranular and Transgranular Fracture Modes in H.C.P. Alloys
||Ismail Mohamed, S. Ziaei, Mohammed Zikry
|On-Site Speaker (Planned)
A dislocation-density based multiple slip crystalline plasticity formulation and a new computational fracture approach have been used to investigate and predict intergranular and transgranular fracture in hexagonal cubic packed (h.c.p.) materials with a focus on h.c.p. alloys subjected to larges changes in strains, strain-rates, and temperatures. This validated predictive framework has been used to understand and predict the interrelated effects of dislocation-density interactions, generation, and recovery on the competition between intergranular and transgranular crack nucleation and propagation. The predictions indicate that iodine pits that have diffused into the GB dominate intergranular fracture and that trangranular fracture is dominated by interrelated dislocation-density interactions and threshold fracture stresses along trangranular cleavage planes.