fig10

Figure 10. (A) The misorientation angle distribution of BCC metal with perfect <110> texture. Orientation changes along the drawing direction: (B and C) Two examples of measuring the cumulative misorientation in the tungsten fiber grains in the EBSD mapping result of tungsten wire at ε = 3.04; (D) Orientation gradient along the drawing direction in the tungsten fiber grains at different strains, error bars show standard deviation of cumulative misorientation. Schematic diagrams for showing the two types <111> twinning directions in present tungsten wires: (E) <111> twinning direction perpendicular to the <110> fiber texture/drawing direction; (F) <111> twinning direction 35.3° away from the <110>fiber texture/drawing direction; (G) Projection along a fixed <111> twinning direction. DD and TD are represented for the drawing direction and twinning direction, respectively.