Transverse creep behavior of a unidirectional metal matrix composite

H. J. Chun, I. M. Daniel

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

The creep behavior under transverse tensile loading of a unidirectional silicon carbide/aluminum (SiC/Al) composite was characterized experimentally and analyzed by means of a micromechanical model based on the average field theory. Creep testing was conducted on the unreinforced aluminum matrix as well as the composite over a temperature range from 24°C (75°F) and 288°C (550°F). It was found that the minimum creep strain rate in the composite can be described by an Arrhenius type power law equation similar to the one used for the unreinforced matrix. This creep rate for the composite is less sensitive to stress amplitude and temperature than that of the matrix material. During creep, a gradual stress transfer takes place between matrix and fibers, followed by stress redistribution and stress relaxation in the matrix, resulting in higher creep resistance. The measured creep strains for various stress amplitudes and at various temperatures were in favorable agreement with predictions.

Original languageEnglish
Pages (from-to)37-46
Number of pages10
JournalMechanics of Materials
Volume25
Issue number1
DOIs
Publication statusPublished - 1997 Jan 1

Keywords

  • Aluminum
  • Arrhenius equation
  • Average field theory
  • Creep
  • Metal-matrix composites
  • Silicon carbide fibers

ASJC Scopus subject areas

  • Materials Science(all)
  • Instrumentation
  • Mechanics of Materials

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