Optimizing Superplastic Response in Navalite, a Lithium Containing Aluminum-Magnesium Alloy

Abstract

Superplastic ductilities up to 428 percent have been attained during research into thermomechanical processing of Al (2.70)MG(2.04)Li-(0.50)Cu-(0.13) Zr (composites in wt.pct.; alloy composition corresponding to NAVALITE). Variation in dislocation density induced by means of warm rolling at a series of temperatures below the discontinuous recrystallization temperature were expected to significantly affect the superplastic response by further grain size refinement. Experimental results indicate no beneficial enhancement in ductilities associated with rolling below 250 C. Consistent elongations in the 400 percent range during this initial evaluation of the NAVALITE alloy indicates further investigation of superplastic response is warranted. Theses.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1989
Accession Number
ADA216552

Entities

People

  • Alden P. Chester Iii

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Space

DTIC Thesaurus Topics

  • Aluminum Alloys
  • Ductility
  • Fabrication
  • Grain Size
  • Magnesium Alloys
  • Materials
  • Materials Science
  • Mechanical Properties
  • Mechanical Working
  • Phase Transformations
  • Physical Metallurgy
  • Recrystallization
  • Solid Solutions
  • Stress Strain Relations
  • Stresses
  • Tensile Testing
  • Transition Temperature

Fields of Study

  • Materials science

Readers

  • Image Processing and Computer Vision.
  • Materials Science and Engineering.
  • Metallurgy