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1468-6996_5_1-2_A23
Formation of nanocrystalline surface layers in various metallic materials by near surface
severe plastic deformation
This article has been downloaded from IOPscience. Please scroll down to see the full text article.
2004 Sci. Technol. Adv. Mater. 5 145
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Formation of nanocrystalline surface layers in various metallic materials
by near surface severe plastic deformation
Masahide Satoa,*, Nobuhiro Tsujib, Yoritoshi Minaminob, Yuichiro Koizumib
aGraduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
bDepartment of Adaptive Machine Systems, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
Received 29 August 2003; revised 29 September 2003; accepted 8 October 2003
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 mm. It was clarified that wire-brushing is an effective way of NS-SPD, and surface nanocrystallization can be easily
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