Hystersis and Acoustic Emission as Non-Destructive Measures of the Fatigue Process in Metals.

Abstract

Piezomagnetic effects are due to interactions between the mechanical and magnetic mesostructure of materials. In particular, under repeated loading cycles, microplastic processes generate dislocations and modify the texture of grains, voids, inclusions, and other defects. These mechanical changes in turn alter the arrangement of the coextensive ferromagnetic domain structure and affect the intensity of the associated magnetic fields.

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Document Details

Document Type
Technical Report
Publication Date
May 31, 1997
Accession Number
ADA329552

Entities

People

  • S. A. Guralnick

Organizations

  • Illinois Institute of Technology

Tags

Communities of Interest

  • Ground and Sea Platforms
  • Sensors

DTIC Thesaurus Topics

  • Accuracy
  • Acoustic Emissions
  • Detection
  • Detectors
  • Emission
  • Fatigue Tests (Mechanics)
  • Ferromagnetic Materials
  • Magnetic Detection
  • Magnetic Fields
  • Magnetometers
  • Materials
  • Materials Testing
  • Measurement
  • Mechanical Working
  • Modulus Of Elasticity
  • Tensile Strength
  • Yield Strength

Readers

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