|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Mechanical Behavior at the Nanoscale IV
||ECCI Analysis ff Dislocation Slip Transfer across Grain Boundaries in Commercially Pure Titanium
||Songyang Han, Martin Crimp
|On-Site Speaker (Planned)
Fully understanding the deformation mechanisms in titanium and titanium alloys will facilitate microstructure design and alleviate damage nucleation for critical applications. Dislocation motion and the transfer of shear across grain boundaries are key to understanding this microstructure optimization. In this study, the nature of the dislocation shear transfer has been studied in commercially pure Ti by characterizing the dislocations involved in the grain boundary shear transfer in four point bend samples. The near surface dislocation distributions along slip lines and grain boundaries were characterized using electron channeling contrast imaging (ECCI), allowing determination of the line directions and Burgers vectors. The nature of the dislocations associated with grain boundary interactions is compared with the distributions within the grains. The extent of slip transfer has been characterized at grain boundaries and assessed in terms of a number of criteria that describe the crystallographic compatibility of dislocation slip systems across the boundaries.
||Planned: Supplemental Proceedings volume