THE RECOVERY OF THE ULTRASONIC ATTENUATION IN COPPER SINGLE CRYSTALS FOLLOWING SMALL PLASTIC DEFORMATION,

Abstract

When a metal undergoes small plastic deformation, there is a change in its apparent Young's Modulus and internal friction. Both of these quantities recover following the deformation. This experiment was made to study the decrease of ultrasonic attenuation in copper single crystals following small plastic deformation. The change in the attenuation of an ultrasonic wave in a stressed single crystal does not take place smoothly. This work indicates that more than one recovery process is involved, and that the most clearly measured process has an activation energy of 1.5ev.

Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1962
Accession Number
AD0612160

Entities

People

  • Julius Frankel

Tags

Communities of Interest

  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Attenuation
  • Crystals
  • Friction
  • Heat Of Activation
  • Internal Friction
  • Modulus Of Elasticity
  • Plastic Deformation
  • Recovery
  • Single Crystals
  • Ultrasounds
  • United States
  • United States Military Academy

Readers

  • Electromagnetic Wave Scattering and Antenna Radiation Engineering
  • Materials Science and Engineering.
  • Structural Dynamics.