Precipitation Reactions in 8090 SiC Particulate Reinforced MMC

Abstract

There is currently much interest in SiC particulate reinforcement of aluminium-lithium based alloys such as 8090 (Al-Li-Cu-Mg) to provide a lightweight, high stiffness and isotropic metal matrix composite (MMC). The composite materials may be heat-treated to develop an optimum balance of mechanical properties. 8090/SiC MMCs produced via spray deposition are reported to exhibit similar ageing kinetics to those of the matrix alloy, but similar materials produced via solid state powder processing and incorporating a higher volume fraction of particulate reinforcement have been shown to exhibit a more rapid ageing response than the unreinforced 8090 matrix. The present research set out to investigate the microstructural changes during age hardening of SiC particulate reinforced 8090 in order to provide a better understanding of the ageing kinetics and thereby complement the efforts towards property optimisation. (JS)

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1990
Accession Number
ADA230646

Entities

People

  • E. Hunt
  • P. D. Pitcher
  • P. J. Gregson

Organizations

  • Royal Aircraft Establishment

Tags

Communities of Interest

  • Space

DTIC Thesaurus Topics

  • Age Hardening
  • Alloys
  • Aluminum
  • Composite Materials
  • Diffraction
  • Electron Diffraction
  • Electron Microscopy
  • Hardening
  • Heat Treatment
  • Materials
  • Mechanical Properties
  • Metal Matrix Composites
  • Metals
  • Precipitation
  • Scattering
  • Specific Heat
  • Transmission Electron Microscopy

Fields of Study

  • Materials science

Readers

  • Aerosol Science/Aerosol Physics
  • Mechanical Engineering/Mechanics of Materials.
  • Reinforced Composite Materials