|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Deformation and Transitions at Interfaces
||Mechanical Characterization of Grain Boundary Regions Using Spherical Nanoindentation
||Shraddha J Vachhani, Roger D Doherty, Surya R Kalidindi
|On-Site Speaker (Planned)
||Shraddha J Vachhani
Understanding of the evolution of microstructure during thermo-mechanical processing of metallic materials is largely hampered by lack of methods for characterizing reliably their local (anisotropic) properties at the sub-micron length scales. Indentation stress-strain curves extracted from spherical nanoindentation testing have demonstrated tremendous potential for addressing this gap. This local mechanical property data, together with the complimentary structure information measured locally using electron backscatter diffraction (EBSD) was used to investigate local changes in the mechanical behavior as a function of crystal orientation as well as with distance from the grain boundaries with an aim to gain insights into the role of these microstructural features during macroscopic deformation. Ambient temperature and high temperature spherical indentation testing of cubic metals in annealed and deformed (to various strain levels) conditions will be presented.