Aluminum alloy foam-filled aluminum tube fabricated by friction stir back extrusion and its compression properties

Yoshihiko Hangai, Shunsuke Otazawa, Takao Utsunomiya

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Al tubes filled with Al foam were fabricated by friction stir back extrusion (FSBE), which can realize metal bonding between the foam and tube. In this process, an Al tube was first fabricated from bulk Al. Next, foamable precursor was coated on the surface of the inner wall of the fabricated tube. Thereafter, the tube coated with the precursor was heat-treated to foam the precursor, thus obtaining a tube filled with foam. In the tube fabrication process, it was found that a tube can be fabricated from a block with no defects and similar compression responses to that of a tube fabricated by a machining process. For the foaming process, it was found that the bonding of the precursor and tube induces strong bonding between the foam and tube. Regarding the compression properties of the tube, it was found that the foam-filled tube exhibited superior compression properties to empty tubes and foams. In particular, during compression tests, a decrease in the stress in stress–strain curves for an empty tube due to the generation of a fold can be avoided by filling the tube with foam filler with metal bonding between the foam and tube.

Original languageEnglish
Pages (from-to)416-422
Number of pages7
JournalComposite Structures
Volume183
Issue number1
DOIs
Publication statusPublished - 2018 Jan 1

Keywords

  • Cellular materials
  • Composites
  • Foam
  • Friction welding

ASJC Scopus subject areas

  • Ceramics and Composites
  • Civil and Structural Engineering

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