Effect of tool rotating rate on foaming properties of porous aluminum fabricated by using friction stir processing

Yoshihiko Hangai, Takao Utsunomiya, Makoto Hasegawa

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69 Citations (Scopus)


A1050 porous aluminum is fabricated by the FSP route and the effect of the tool rotating rate on the porosity and morphology of the pores is investigated. To fabricate high-porosity porous aluminum with a uniform pore size distribution, a certain amount of stirring action is necessary; however, excessive stirring action is ineffective. A sufficiently uniform mixture is realized by traversing the FSP tool two times at a tool rotating rate exceeding 2200 rpm. The results indicate the minimum necessary amount of stirring action and will provide a guideline for improving productivity. Also, to improve the morphology of pores, optimizing the amount of Al2O3 is effective. Closed-cell porous aluminum with a porosity of about 80% was successfully fabricated by 2-pass FSP at 2200 rpm with the addition of 7 mass% Al2O3, a holding temperature of 998 K and a holding time of 10 min.

Original languageEnglish
Pages (from-to)288-292
Number of pages5
JournalJournal of Materials Processing Technology
Issue number2
Publication statusPublished - 2010 Jan 19



  • Aluminum alloy
  • Foam
  • Friction stir processing
  • Porosity
  • Porous metals

ASJC Scopus subject areas

  • Ceramics and Composites
  • Computer Science Applications
  • Metals and Alloys
  • Industrial and Manufacturing Engineering

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