Formation of nanocrystalline surface layers in various metallic materials by near surface severe plastic deformation

Masahide Sato, Nobuhiro Tsuji, Yoritoshi Minamino, Yuichiro Koizumi

Research output: Contribution to journalArticlepeer-review

114 Citations (Scopus)

Abstract

The surface of the various kinds of metallic materials sheets were severely deformed by wire-brushing at ambient temperature to achieve nanocrystalline surface layer. The surface layers of the metallic materials developed by the near surface severe plastic deformation (NS-SPD) were characterized by means of TEM. Nearly equiaxed nanocrystals with grain sizes ranging from 30 to 200 nm were observed in the near surface regions of all the severely scratched metallic materials, which are Ti-added ultra-low carbon interstitial free steel, austenitic stainless steel (SUS304), 99.99 wt.%Al, commercial purity aluminum (A1050 and A1100), Al-Mg alloy (A5083), Al-4 wt.%Cu alloy, OFHC-Cu (C1020), Cu-Zn alloy (C2600) and Pb-1.5%Sn alloy. In case of the 1050-H24 aluminum, the depth of the surface nanocrystalline layer was about 15 μm. It was clarified that wire-brushing is an effective way of NS-SPD, and surface nanocrystallization can be easily achieved in most of metallic materials.

Original languageEnglish
Pages (from-to)145-152
Number of pages8
JournalScience and Technology of Advanced Materials
Volume5
Issue number1-2
DOIs
Publication statusPublished - 2004 Jan

Keywords

  • Aluminum alloy
  • Copper alloy
  • Grain size
  • Lead alloy
  • Microstructure
  • Nanocrystalline materials
  • Severe plastic deformation
  • Steel
  • Surface modification
  • Ultra-grain refinement

ASJC Scopus subject areas

  • Materials Science(all)

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