Crystallographic orientation influence on slip system activation and deformation mechanisms in Waspaloy during in-situ mechanical loading

The deformation mechanism correlations with individual grain orientation, overall texture, boundary characteristics, dislocation accumulation and evolutions were investigated during in-situ room temperature tensile testing of a nickel-based superalloy, Waspaloy. During testing, electron backscatter diffraction (EBSD) mappings, as well microscopy images acquired at increments displacement to observe the exact mechanics in different orientated grains plastic deformation. Here, it is demonstrated that Cube (001)<100> readily rotated Copper (112)<111> texture component area fraction increased loading. It was also shown behaved “soft” easily activated an available octahedral (111)<1–10> slip system through simple shear mechanisms, allowing for easy movement within grain. On contrary, Brass (011)<211> acted “hard” most stable orientation they not favourably activation. response variations external loading from created high strain incompatibility between neighbouring causing GND density along boundaries depending on grain’s orientation.