A Comparison of the Aging Kinetics of a Cast Alumina-6061 Aluminum Composite and a Monolithic 6061 Aluminum Alloy

Abstract

Electrical resistivity and hardness measurements were conducted during isothermal aging treatments of an alumina particulate reinforced 6061 aluminum metal matrix composite and a monolithic 6061 aluminum control material. Transmission electron microscopy was utilized to examine the microstructural changes accompanying the changes in the resistivity of the monolithic during aging. In addition, differential scanning calorimetry was used to investigate the growth kinetics and thermal stability of the metastable phases in the control sample. From DSC experiments, the heats of formation of the metastable phases were determined as functions of aging time and temperature. These results were used to characterize the aging behavior of the matrix material. Keywords: Aluminum composite, Conductivity, Aluminum alloys.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1989
Accession Number
ADA225398

Entities

People

  • Johanna L. Hafley

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Aluminum
  • Composite Materials
  • Computer Programs
  • Electron Microscopy
  • Energy
  • Hardness
  • Heat Transfer
  • Materials
  • Materials Engineering
  • Materials Science
  • Measurement
  • Mechanical Properties
  • Metal Matrix Composites
  • Microscopy
  • Particles
  • Solid Solutions
  • Transmission Electron Microscopy

Fields of Study

  • Materials science

Readers

  • Powder metallurgy of Titanium alloys.

Technology Areas

  • Microelectronics