Plasticity of Single Crystalline Al3X Intermetallic Compounds

Abstract

This report summarizes our progress on this program in three areas: Deformation of Ll2 single crystalline Al3Ti + Fe, high resolution transmission electron microscopy of dislocations and faults in this material, and computer simulations of dislocations and faults in both the DO22 and Ll2 form. The slip systems have been determined from macroscopic and microscopic analysis, and a new form of dislocation dissociation has been observed. The computer simulations have shown why the temperature dependence of the flow strength is so distinct at low temperatures and why the DO22 form is always so brittle.

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Document Details

Document Type
Technical Report
Publication Date
Apr 06, 1991
Accession Number
ADA234699

Entities

People

  • David E. Luzzi
  • David P. Pope
  • Vaclay Vitek

Organizations

  • University of Pennsylvania

Tags

DTIC Thesaurus Topics

  • Air Force
  • Alloys
  • Computer Simulations
  • Crystallography
  • Crystals
  • Dislocations
  • Dissociation
  • Electron Microscopes
  • Electron Microscopy
  • High Temperature
  • Low Temperature
  • Materials
  • Materials Science
  • Microscopy
  • Simulations
  • Single Crystals
  • Transmission Electron Microscopy

Fields of Study

  • Physics

Readers

  • Computer Science.
  • Powder metallurgy of Titanium alloys.

Technology Areas

  • Microelectronics