Development of an Al-Mg-Li Alloy

Abstract

A program to optimize composition in the Al-Mg-Li system was conducted in two phases. In Phase I, a series of alloys containing Al-3.5 Mg-2.5 Li with Cr, Mn, or Zr was investigated. The alloy containing 0.3% Mn developed the best combination of strength and notch toughness. Under Phase II, effects of Mg and Li content in the Al-Mg-Li-0.3 Mn alloy system were determined. Nine alloy combinations ranging from 1.4 to 3.1 Li and 2.0 to 4.9 Mg were evaluated. Strength and modulus increased and density decreased with increasing Li. Fracture toughness of these alloys were below minimum acceptable levels for commercial product.

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Document Details

Document Type
Technical Report
Publication Date
Jun 09, 1976
Accession Number
ADA034954

Entities

People

  • T. H. Sanders Jr.

Organizations

  • Alcoa

Tags

Communities of Interest

  • Energy and Power Technologies
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Aircrafts
  • Chemical Analysis
  • Chemistry
  • Crystal Structure
  • Electron Microscopy
  • Materials
  • Materials Engineering
  • Materials Science
  • Mechanical Properties
  • Mechanical Working
  • Mechanics
  • Metallurgy
  • Modulus Of Elasticity
  • Notch Toughness
  • Plastic Explosives
  • Solid Solutions
  • Tensile Strength

Fields of Study

  • Materials science

Readers

  • Analytical Mechanics
  • Materials Science and Engineering.