ULTRASONIC TREATMENT OF SPECIMENS IN THE ELECTRON MICROSCOPE.

Abstract

A method and technical details are described for direct observation of effects of high amplitude ultrasonic stress waves on dislocations in metal crystals. The technique combines, for the first time, ultrasonic treatment at high acoustic energy densities (up to 10 to the 9th power ergs/cu cm at frequencies between 30 and 100 kc), observation of damping of stress waves, and electron microscopy. Results from this in situ technique allow fundamental refinement of pesent theories on ultrasonic activation of dislocation mechanisms. (Author)

Document Details

Document Type
Technical Report
Publication Date
Aug 26, 1965
Accession Number
AD0631228

Entities

People

  • B. Langenecker

Organizations

  • Naval Air Weapons Station China Lake

Tags

DTIC Thesaurus Topics

  • Amplitude
  • Crystals
  • Dislocations
  • Electron Microscopes
  • Electron Microscopy
  • Electrons
  • Frequency
  • Frequency Shift
  • Metal Crystals
  • Microscopes
  • Microscopy
  • Observation
  • Stress Waves
  • Stresses
  • Waves

Fields of Study

  • Physics

Readers

  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Materials Science and Engineering.

Technology Areas

  • Microelectronics