Fabrication of surface nanocrystalline aluminum alloys

M. Sato, N. Tsuji, Y. Minamino, Y. Koizumi

Research output: Contribution to journalConference articlepeer-review

24 Citations (Scopus)

Abstract

In the present study, the authors aimed to fabricate surface nanocrystalline aluminum alloys by severe plastic deformation. The surface of the various kinds of aluminum alloy sheets were stirred and highly strained by wire-brushing at ambient temperature. The process was applied to 99.99wt.%Al, commercial purity aluminum (1050 and 1100), Al-Mg alloy (5083) and Al-4wt.%Cu alloy. In all the wire-brushed aluminum alloys, nearly equiaxed nanocrystals with grain sizes ranging from 60 nm to 200 nm were observed at surface regions. In case of the 1050-H24 aluminum, the depth of the surface nanocrystalline layer is about 15 μm. The wire-brushed sheet of 1100-O 1 mm thick with the surface nanocrystalline structure performed the 0.2% proof stress 1.5 times higher than that of the starting sheet.

Original languageEnglish
Pages (from-to)2753-2758
Number of pages6
JournalMaterials Science Forum
Volume426-432
Issue number3
DOIs
Publication statusPublished - 2003
EventThermec 2003 Processing and Manufacturing of Advanced Materials - Madrid, Spain
Duration: 2003 Jul 72003 Jul 11

Keywords

  • Aluminum alloys
  • Grain size
  • Mechanical properties
  • Microstructure
  • Nanocrystals
  • Severe plastic deformation
  • Surface
  • Ultrafine grains

ASJC Scopus subject areas

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

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