Deformation behavior of a PM Al6013/15SiCPcomposite sheet at elevated temperature

G. Q. Tong, Kang Cheung Chan

Research output: Journal article publicationJournal articleAcademic researchpeer-review

30 Citations (Scopus)

Abstract

The elevated temperature deformation behavior of an Al6013/15SiCPcomposite sheet was investigated by uniaxial tensile tests at temperatures ranging from 723 to 853 K and at initial strain rates between 1.67×10-3and 1.67×100 s-1. The strain rate sensitivity exponent was found to be approximately 0.17 which was apparently below that of a superplastic material. A maximum elongation of ~177% was obtained at an initial strain rate of 6.67×10-1s-1and at a temperature of 773 K. The apparent activation energy was calculated to be approximately 370 kJ/mole which is much higher than that of its unreinforced counterpart. The fracture surface morphology showed a large amount of localized plastic deformation in the aluminum matrix and numerous large cavities. The experimental results were compared with that of a high-strain-rate superplastic Al6061/20SiCW. It was considered that premature failure at the reinforcement/matrix interfaces was the main reason for the Al6013 composite not showing superplastic properties.
Original languageEnglish
Pages (from-to)326-330
Number of pages5
JournalMaterials Letters
Volume38
Issue number5
DOIs
Publication statusPublished - 5 Mar 1999

Keywords

  • Aluminum-based composite
  • Fracture morphology
  • Hot deformation
  • Uniaxial tension

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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