The Age Hardening Response of Thermomechanically Processed Al-Mg-Li Alloys.

Abstract

Four Al-Mg-Li alloys of composition (weight percent) in the ranges 6-8% Mg, 0.5-2% Li, and 0.15-0.25% Zr were hot forged and warm rolled (thermo-mechanically processed) to achieve a microstructure suitable for superplasticity. They were then subjected to age-hardening studies at temperatures indicated by concurrent differential scanning calorimetry research. Optical and transmission electron microscopy techniques were used to relate microstructure to mechanical properties. Only the 6%Mg-2%Li alloy showed significant age hardening response, however, concurrent research demonstrated excellent superplastic response in the 6%Mg-1%Li and 8%Mg-1%Li alloys. Keywords: Thermomechanically, Processed, Superplasticity, Age Hardening Studies, Aluminum alloys, Magnesium alloys, Lithium alloys.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1987
Accession Number
ADA189870

Entities

People

  • William F. Ferris

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Ground and Sea Platforms
  • Space

DTIC Thesaurus Topics

  • Age Hardening
  • Alloys
  • Aluminum Alloys
  • Chemistry
  • Crystal Lattices
  • Crystal Structure
  • Electron Microscopy
  • Hardening
  • Hardness
  • Lithium Alloys
  • Materials
  • Mechanical Properties
  • Mechanical Working
  • Microscopy
  • Solid Solutions
  • Tensile Strength
  • Transmission Electron Microscopy

Fields of Study

  • Materials science

Readers

  • Powder metallurgy of Titanium alloys.

Technology Areas

  • Microelectronics