Atomistic Study of Metastable Phases in an A1-3wt.%-Li0 .12wt.%-Zr Alloy. A Preliminary Study of A1-Li Alloys Using Atom-Probe Field Ion Microscopy and Transmission Electron Microscopy.

Abstract

This report consists of reprints of two papers which the writer coauthored. Two aluminum-lithium alloys, one containing 2 wt% Li and the other 3 wt% Li - 0.12 wt% Zr, were examined using transmission electron microscopy (TEM), field-ion microscopy (FIM) and atom-probe field-ion microscopy (APFIM). Results show that both FIM and APFIM are potentially the most powerful techniques for the analysis of Li-containing alloys, because Li can be detected and analyzed quantitatively using the APFIM. Good correlation between the FIM images of the delta (Al3Li) and the beta' (Al3Zr), with those obtained using conventional TEM imaging has been obtained. Finally, beta' in the aged Al-Li-Zr alloy has been shown to be virtually stoichiometric and Li incorporation in the beta' is suggested to be a minor effect.

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Document Details

Document Type
Technical Report
Publication Date
Mar 02, 1987
Accession Number
ADA178282

Entities

People

  • Howard W. Pickering

Organizations

  • University of Pennsylvania

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Space

DTIC Thesaurus Topics

  • Alloys
  • Chemical Analysis
  • Chemistry
  • Electron Microscopy
  • Engineered Materials
  • Engineering
  • Field Ion Microscopy
  • Mass Spectrometry
  • Materials
  • Materials Engineering
  • Materials Science
  • Mechanical Properties
  • Microscopy
  • Solid Solutions
  • Solid State Physics
  • Spectroscopy
  • Transmission Electron Microscopy

Fields of Study

  • Materials science

Readers

  • Electrochemical Engineering/ Fuel Cell Technologies
  • Powder metallurgy of Titanium alloys.

Technology Areas

  • Microelectronics