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Q. Han, C. Xu and X. Jian, “A Method of Producing Nanostructured Metals Using High-Intensity Ultrasonic Vibration,” US Patent No. 0256764, 2007.

has been cited by the following article:

• TITLE: Severe Plastic Deformation of Steel Induced by Ultrasonic Vibrations

  AUTHORS: C. Xu, Y. Cui, Q. Han

  KEYWORDS: Severe Plastic Deformation; Nanostructured Materials; Ultrasonic Vibration

  JOURNAL NAME: Open Journal of Metal, Vol.3 No.1, March 26, 2013

  ABSTRACT: High-intensity ultrasonic vibration was focused on the tip of conical steel specimens to induce severe plastic deformation at room temperature. We found, for the first time, that grain size smaller than 200 nm was obtained. Furthermore, the sharp tip of the conical specimen became umbrella-shaped or disk-shaped. The tip size changed from 0.5 mm diameter to a disk about 5 mm diameter, representing a large amount of plastic deformation in the metal at the tip of the conical specimen.