INVESTIGATION OF THE EFFECTS OF ULTRASONICS ON THE DEFORMATION CHARACTERISTICS OF METALS

Abstract

A few aspects of the ultrasonic influence on the plasticity of metals are treated in this aper. It is shown that with purest zinc crystals the recovery from the cold-hardened condition (measured as the decrease of the shearing stress of the basal plane) is accelerated by an ultrasonic treatment during the period of recovery. Also the second softening mechanism - recrystallization by way of nucleation and growth of crystals - is activated at certain temperatures by ultrasonic influences, as is shown by tests with poly-crystalline specimens of commercial zinc. Both softening mechanisms are based on diffusion processes in the lattice, whose kinetics is accelerated by ultrasonic treatment under the conditions used.

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Document Details

Document Type
Technical Report
Publication Date
Apr 30, 1963
Accession Number
AD0407908

Entities

Organizations

  • University of Vienna

Tags

Communities of Interest

  • Air Platforms
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Annealing
  • Crystal Structure
  • Crystals
  • Frequency
  • Hardness
  • Lead Zirconate Titanates
  • Materials
  • Metal Crystals
  • Recovery
  • Recrystallization
  • Single Crystals
  • Softening
  • Sound Generators
  • Strain Hardening
  • Stresses
  • Ultrasonics
  • Ultrasounds

Readers

  • Materials Science and Engineering.
  • Structural Health Monitoring of Composite Structures.