A Fundamental Study of Flow and Fracture in Beryllium.

Abstract

The effect of thermomechanical treatments on the grain size of HIP beryllium powder block and cast beryllium alloys has been studied. A grain size controlled fracture mode change has been observed in both powder source and ingot source beryllium. The mechanism of recrystallization in beryllium has been observed to be the in situ transformation of subgrains to grains by dislocation migration from grain interiors to grain boundaries. Maximum impact resistance was observed in partly recrystallized structures rather than the expected fully recrystallized state. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1978
Accession Number
ADA052824

Entities

People

  • Donald D. Crooks
  • Donald Webster

Organizations

  • Lockheed Martin Missiles and Space

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Alloys
  • Beryllium Alloys
  • Boundaries
  • Dosage Forms
  • Electron Microscopes
  • Electron Microscopy
  • Fine Grained Materials
  • Grain Boundaries
  • Grain Growth
  • Grain Size
  • Materials
  • Metallic Compounds
  • Microscopy
  • Particles
  • Powders
  • Resistance
  • Transitions

Fields of Study

  • Materials science

Readers

  • Powder metallurgy of Titanium alloys.