Investigation of the Elastic Behavior of Al-Li-X Alloys.

Abstract

Several A1 alloys were investigated. The Young's modulus, shear modulus and Poisson's ratio were determined using an ultrasonic pulse echo technique. The elastic properties were measured as a function of aging time, aging temperature, amount of stretching and testing direction. An increase in Young's modulus due to delta prime and T1 precipitation has been measured and treated quantitatively including precipitation kinetics. A significant decrease of about 5% in the modulus of elasticity can be found in peak age conditions. This decrease can be attributed to precipitation of the T2 phase. The shear modulus behaves similar to Young's modulus while the Poisson's ratio remains unchanged. There is no significant orientation dependence of the elastic properties on testing direction despite the fact that a typical rolling texture was present.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1987
Accession Number
ADA182154

Entities

People

  • E. A. Starke Jr.
  • Wolfgang W. Ruch

Organizations

  • University of Virginia

Tags

Communities of Interest

  • Biomedical
  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Chemical Analysis
  • Chemical Synthesis
  • Chemistry
  • Crystal Structure
  • Crystallography
  • Crystals
  • Elastic Properties
  • Electron Microscopes
  • Materials
  • Materials Science
  • Measurement
  • Mechanical Properties
  • Mechanics
  • Modulus Of Elasticity
  • Shear Modulus
  • Solid Solutions
  • Solid State Physics

Fields of Study

  • Materials science

Readers

  • Materials Science and Engineering.
  • Plasma Physics / Magnetohydrodynamics
  • Powder metallurgy of Titanium alloys.