A Fundamental Study of Precipitates and the Influence of their Crystal Structure on the Strength of Age-Hardenable Aluminum-Lithium Alloys.

Abstract

From the results obtained in this study, it is apparent that A1-Cu-Li alloys are amenable to electrochemical extraction. A Combination of extracting to a powder and x-ray diffractometer scanning should produce optimum results. Confirmation of this should then allow a determination of the effects of minor alloying additions on the precipitated phases in A1-Cu-Li and A1-Li alloys, an evaluation of the sequential development of these phases during age-hardening as a function of both lithium content and aging temperature, and an assessment of the influence of the precipitates, as well as insolubles and dispersoids, on fracture toughness.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1978
Accession Number
ADA063005

Entities

People

  • Franklin H. Cocks
  • Marion L. Shepard

Organizations

  • Duke University

Tags

DTIC Thesaurus Topics

  • Age Hardening
  • Alloys
  • Aluminum Alloys
  • Chemical Analysis
  • Chemistry
  • Crystal Structure
  • Diffraction
  • Diffractometers
  • Lithium
  • Lithium Alloys
  • Metallic Compounds
  • Metals
  • Military Research
  • Physical Metallurgy
  • Solid Solutions
  • Toughness
  • X Rays

Fields of Study

  • Materials science

Readers

  • Powder metallurgy of Titanium alloys.