Fabrication of VGCF reinforced aluminum matrix composites by powder can extrusion and investigation of their reinforcing mechanism

Fumio Ogawa, Chitoshi Masuda

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Aluminum matrix composites reinforced by vapor grown carbon fibers (VGCF) were fabricated by powder can extrusion. Extrusion ratio was 9 or 16. Temperature and heating duration were changed to investigate the effect of extrusion condition on properties of composites. Measurement of micro-Vickers hardness, tensile strength was conducted and micro structure such as VGCF orientation was characterized. When extrusion temperature was higher or when heating duration was longer, mechanical strength was lower, but fracture strain was higher. In addition, reinforcing efficiency to aluminum was higher for longer heating duration and higher extrusion ratio, due to improved VGCF orientation. Strength was modeled considering load bearing by VGCF, VGCF orientation, work hardening of matrix due to thermal expansion mismatch of VGCF and aluminum and Orowan looping mechanism. From those results and the observation of aluminum grain in composites, reinforcing mechanism of VGCF reinforced composites was discussed.

Original languageEnglish
Pages (from-to)350-357
Number of pages8
JournalKeikinzoku/Journal of Japan Institute of Light Metals
Volume63
Issue number10
DOIs
Publication statusPublished - 2013 Dec 1
Externally publishedYes

Keywords

  • Aluminum matrix composites
  • Microstructure
  • Powder can extrusion
  • Reinforcing mechanism
  • Vapor grown carbon fiber

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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