EBSD and TEM characterization of ultrafine grained high purity aluminum produced by accumulative roll-bonding

N. Kamikawa, X. Huang, N. Tsuji, N. Hansen, Y. Minamino

Research output: Chapter in Book/Report/Conference proceedingConference contribution

8 Citations (Scopus)

Abstract

High purity aluminum (99.99% purity) was severely deformed by accumulative roll-bonding (ARB) to a thickness reduction of 98.4%. Quantitative microstructural characterization of the deformed sample was carried out by electron backscatter diffraction (EBSD) and transmission electron microscopy (TEM). EBSD scans at various locations from the sample surface to the mid-thickness revealed a fairly uniform and equiaxed structure, although a small fraction of an elongated structure parallel to rolling direction (RD) was also observed. Misorientation angle distributions for grain boundaries of which misorientation angle was larger than 2° were evaluated by EBSD, showing that more than 70% of the boundaries were high-angle ones (>15°). More detailed structural features, such as low-angle boundaries (<2°) and dislocations between boundaries were characterized by TEM. The TEM results indicated that about 17% of the boundaries have misorientations <2° and that the fraction of high-angle boundaries is about 52%. An estimated yield strength based on the structural parameters determined by TEM was in good agreement with the measured value.

Original languageEnglish
Title of host publicationAdvanced Structural and Functional Materials Design - Proceedings of the International Symposium on Advanced Structural and Functional Materials Design, 2004
PublisherTrans Tech Publications Ltd
Pages91-96
Number of pages6
ISBN (Print)0878499962, 9780878499960
DOIs
Publication statusPublished - 2006 Jan 1
Externally publishedYes
EventInternational Symposium on Advanced Structural and Functional Materials Design, 2004 - Osaka, Japan
Duration: 2004 Nov 102004 Nov 12

Publication series

NameMaterials Science Forum
Volume512
ISSN (Print)0255-5476
ISSN (Electronic)1662-9752

Other

OtherInternational Symposium on Advanced Structural and Functional Materials Design, 2004
CountryJapan
CityOsaka
Period04/11/1004/11/12

Keywords

  • Accumulative roll-bonding (ARB)
  • EBSD
  • High purity aluminum
  • Microstructural characterization
  • TEM

ASJC Scopus subject areas

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

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