|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Non-equilibrium Features of Grain Boundaries
||Grain Boundary Factors Related to Void Formation
||Curt Bronkhorst, Sabine Zentgraf, Veronica Livescu, Marcy Peter, Scott Vander Wiel, George Gray, Hashem Mourad, Brandon Runnels
|On-Site Speaker (Planned)
Under high rates of mechanical loading of polycrystalline metallic materials, grain boundaries are frequently the preferred locations for the formation of voids. Within BCC tantalum, while accounting for non-Schmid effects, it is suggested through computational results that the orientation of the boundaries are a factor in determining normal/shear traction conditions across second-order grain boundaries. The results also suggest that the stress conditions at third-order grain boundaries are significantly different with the prominence of hydrostatic stress. The computational results are linked directly with results of experiments to capture early stage void formation and define individual voids and their connection with specific grain boundaries. The grain boundary type and energy as a factor in defining the physical state of a grain boundary are identified with individual pores. These results are discussed in the context of defining physical factors involved in the formation of voids.
||Planned: Supplemental Proceedings volume