Acoustic Emission Behavior of Nickel during Tensile Deformation.

Abstract

Commercial 99.6% purity nickel (Ni-200) was studied in detail for its AE behavior. The specimens slowly cooled from high-annealing temperature exhibited much higher AE signal levels than the quenched samples. This was attributed to the existence of solute pinning atmospheres around dislocations. The kinetic study using AE technique quantitatively determined the activation energy of solute diffusion, which was found to be close to the activation energy for the carbon diffusion in nickel. An AE source model based on the dislocation acceleration and/or deceleration following unpinning was presented. The effects of deformation temperature, including dynamic strain aging phenomenon, were also discussed. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1982
Accession Number
ADA120065

Entities

People

  • K. Ono
  • S.-y. S. Hsu

Organizations

  • University of California, Los Angeles

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Acoustic Emissions
  • Annealing
  • Atmospheres
  • California
  • Diffusion
  • Elements
  • Emission
  • Heat Of Activation
  • Heat Treatment
  • Impurities
  • Kinetics
  • Materials
  • Materials Science
  • Physics
  • Plastic Deformation
  • Strain Rate
  • Tensile Testing

Fields of Study

  • Materials science

Readers

  • Materials Science and Engineering.
  • Trauma or Military Medicine