ENGINEERING PROGRESS REPORT ON INVESTIGATION OF THE BASIC MECHANISM OF METAL FATIGUE

Abstract

The mechanism of metal fatigue is being investigated by studying dislocation dynamics in single crystals during stress cycling by means of ultrasonic attenuation measurements in the megacycle frequency range. A basic and applied approach are being explored. The basic investigation will be limited to the first cycle of stress--essentially a study of the Bauschinger effect. The applied portion will deal with an evaluation of similar measurements made continuously, cycling to fracture. All studies will be performed on pure, annealed single crystals of definite orientation in order that the attenuation measurements will be susceptible to interpretation in terms of dislocation damping theories.

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Document Details

Document Type
Technical Report
Publication Date
Oct 28, 1963
Accession Number
AD0425449

Entities

People

  • Barry Z. Hyatt
  • Louis J. Teutonico

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Contracts
  • Corporations
  • Crystal Structure
  • Crystallography
  • Crystals
  • Engineering
  • Government Procurement
  • Graphitic Materials
  • Load Cells
  • Materials
  • Measurement
  • Polycrystals
  • Power Supplies
  • Single Crystals
  • Solid State Physics
  • Temperature Gradients
  • X Rays

Readers

  • Materials Science (Mechanical Engineering).
  • Mechanical Engineering/Mechanics of Materials.
  • Technical Research and Report Writing.