Characterization of Cryogenic Mechanical Properties of Aluminum-Lithium Alloy C-458

Abstract

Mechanical properties of aluminum-lithium alloy C-458, which is one of the new generation alloys being developed for aerospace structural applications, were characterized. In light of potential applications of this alloy in future space launch vehicles, the effect of decreasing temperature down to 4K on the tensile and fracture properties were investigated. The tensile strength and the ductility increased at cryogenic temperatures, while the fracture toughness reduced slightly at 4K. This alloy was not sensitive to long-term low-temperature aging unlike some previous aluminum-lithium alloys. This may be attributed to the fact that the level of alkaline metal impurities in 0-458 is substantially lower than those of other aluminum-lithium alloys.

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Document Details

Document Type
Technical Report
Publication Date
May 30, 2000
Accession Number
ADA380362

Entities

People

  • D. C. Kooi
  • M. R. Hilton
  • W. Park

Organizations

  • The Aerospace Corporation

Tags

Communities of Interest

  • Advanced Electronics
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force
  • Aluminum
  • Chemistry
  • Detectors
  • Hyperspectral Imagery
  • Launch Vehicles
  • Lithium Alloys
  • Low Temperature
  • Materials
  • Mechanical Properties
  • Mechanics
  • Metals
  • Microelectromechanical Systems
  • Space Systems
  • Tensile Properties
  • Tensile Strength
  • Toughness

Fields of Study

  • Materials science

Readers

  • Powder metallurgy of Titanium alloys.

Technology Areas

  • Space