subgrainscale

Subgrainscale refers to the scale of observation and analysis that focuses on the internal structure of individual grains within a crystalline material. This scale is smaller than the macroscopic level where bulk material properties are typically measured, but larger than the atomic or microscopic scale which examines individual atoms or very small clusters of atoms. At the subgrainscale, the focus is on features such as subgrains, dislocations, grain boundaries, and other defects that influence the material's behavior.

Subgrains are small, low-angle misoriented regions within a larger grain. They are often formed during processes like recovery or recrystallization in metals and ceramics. Analyzing at the subgrainscale allows for the understanding of how these internal structures develop and how they relate to macroscopic properties like strength, ductility, and creep resistance. Techniques used to study the subgrainscale include transmission electron microscopy (TEM), electron backscatter diffraction (EBSD), and high-resolution X-ray diffraction. These methods reveal the arrangement and density of dislocations, the size and orientation of subgrains, and the characteristics of grain boundaries. Understanding these features at the subgrainscale is crucial for controlling material processing and optimizing performance in various engineering applications.