PREPARATION AND EVALUATION OF HIGH PURITY BERYLLIUM

Abstract

Zone refining procedures for vertical floatingzone type zone melting of Be are described. Single crystals prepared from zone melted Be were tested in tension with their orientation arranged to yield basal plane slip. The critical resolved shear stress varied from 2400 to 400 psi, decreasing with increased purification; the glide strain varied from 16 to 220% increasing with increased purification. Procedures for the rolling of several single crystals of Be are described and the results of recrystallization studies on them are presented. Limited slip, observed when basal flow occurs in polycrystalline material, appears to result from grains constraining one another during deformation. This mechanism of fracture is expected to operate independently of the level of purity of Be.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1961
Accession Number
AD0273621

Entities

People

  • Edward J. Arndt
  • Grant E. Spangler
  • Marvin W. Herman

Organizations

  • Franklin Institute

Tags

Communities of Interest

  • Air Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force
  • Chemistry
  • Crystals
  • Grain Size
  • Manufacturing
  • Materials
  • Materials Engineering
  • Mechanical Properties
  • Mechanical Working
  • Metals
  • New York
  • Orientation (Direction)
  • Shear Stresses
  • Single Crystals
  • Stresses
  • Yield Strength
  • Zone Melting

Readers

  • Materials Science and Engineering.
  • Mathematics or Statistics
  • Metallurgy