Anelastic Relaxations Associated with Local Disordering in Grain Boundaries

Abstract

Internal friction and micro-creep measurements were performed with high-purity Al bamboo-crystal specimens. The relaxation strength was found to decrease with the decrease of the temperature of measurement and became zero at about 0. 4T sub m, (T sub m being melting temperature). This reflects the occurrence of local disordering in the bamboo boundary region at this temperature. This result conforms to the picture of grain boundary disordering constructed by atomic simulation studies.... Grain boundary disordering, Internal friction, Microcreep, High purity al.

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Document Details

Document Type
Technical Report
Publication Date
Apr 02, 1993
Accession Number
ADA263101

Entities

People

  • Bolin Cheng
  • Tingsui Ge

Organizations

  • National Air and Space Intelligence Center

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Annealing
  • Boundaries
  • Crystallography
  • Crystals
  • Electron Microscopes
  • Frequency
  • Friction
  • Grain Boundaries
  • High Temperature
  • Internal Friction
  • Low Temperature
  • Materials
  • Melting
  • Melting Point
  • Phase Transformations
  • Relaxation Time
  • Solid State Physics

Readers

  • Critical Infrastructure Protection in CBRN and WMD Threats.
  • Materials Science (Mechanical Engineering).
  • Mechanical Engineering/Mechanics of Materials.