fig6
Figure 6. Radial microstructure evolution of FRC22 rod: (A1-A2), (B1-B2) and (C1-C2) are respectively the central, middle and edge EBSD maps. GB: Grain boundary; TB: twin boundary; IPF: inverse pole figure; FRC: free-rotational compression; FET: free end torsion; RD: rolling direction; ED: extrusion direction; RFET: reverse FET; DA: deviation angle; EBSD: electron backscattered diffraction; TTB: tensile twin boundary; CTB: compressive twin boundary; STB: secondary twin boundary; DTB: double twin boundary.








