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

<div>TEM images of the USSR sample in the topmost surface layer: (a, b) high-magnificent images and (c, d) low-magnificent images under (a, c) bright-field and (b, d) dark-field models.</div>

Scanning

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Figure 5

Figure 5: Microstructure and Mechanical Properties of Gradient Nanostructured Q345 Steel Prepared by Ultrasonic Severe Surface Rolling 