Microstructure and Mechanical Properties of Gradient Nanostructured Q345 Steel Prepared by Ultrasonic Severe Surface Rolling

Figure 2

The EBSD result of the as-received sample: (a) IPF map, (b) grain size statistics, (c) BC map, and (d) KAM map. The black and white lines in (a, c) profile the HAGBs and LAGBs, respectively.