Manufacture and mechanical testing of hybrid aluminum/graphite/epoxy rods with different surface treatments

J. B. Berman, R. G. Albers, S. R. White

Research output: Contribution to journalArticle

Abstract

Hybrid rods of aluminum and graphite/epoxy composite were designed, manufactured, and mechanically tested in uniaxial tension. The objective was to produce hybrid rods which were lighter in weight compared to an all aluminum rod, yet retained the axial mechanical performance of aluminum in tension (modulus and strength). Hybrid rods were manufactured by filament winding of AS4/3501-6 graphite/ epoxy onto 7075-T6 aluminum mandrels. In all cases, failure was interfacial at the aluminum/epoxy interface. Special consideration was given to chemical and mechanical surface treatments to increase interfacial bonding and thus, hybrid rod axial strength. The best performance was obtained from the rods which were mechanically knurled, phosphoric acid anodization treated, and coupled with an FM 300 adhesive film (nitrile epoxy) and BR-127 primer. For these specimens, the weight, modulus and strength ratios, compared to 7075-T6 aluminum were 0.82, 1.23 and 0.81, respectively.

Original languageEnglish (US)
Pages (from-to)18-30
Number of pages13
JournalJournal of Advanced Materials
Volume27
Issue number1
StatePublished - Oct 1995

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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