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An unreported precipitate orientation relationship in Al-Zn-Mg based alloys

Abstract

Characterization of precipitates in Al-Zn-Mg alloys, using a combination of electron diffraction, bright field transmission electron microscopy and atomic scale scanning transmission electron microscopy imaging revealed the presence of an unreported η13 orientation relationship between the η-MgZn2 phase and the Al lattice with the following orientation relationship (0001)η (120)Al and η (001)Al, plate on (120)Al. The precipitate interfaces were observed and analyzed along two projections 90° to one-another. The precipitate coarsening was through the common thickening ledge mechanism. The ledges were significantly stepped along one lateral direction. An interface relaxation model using density functional theory was carried out to explain the precipitate behavior.
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Category

Academic article

Language

English

Author(s)

  • Artenis Bendo
  • Kenji Matsuda
  • Adrian Lervik
  • Tomohito Tsuru
  • Katsuhiko Nishimura
  • Norio Nunomura
  • Randi Holmestad
  • Calin Daniel Marioara
  • Kazuyuki Shimuzu
  • Hiroyuki Toda
  • Masatake Yamaguchi

Affiliation

  • SINTEF Industry / Materials and Nanotechnology
  • Norwegian University of Science and Technology
  • Kyushu University
  • Toyama University
  • Japan Atomic Energy Agency

Year

2019

Published in

Materials Characterization

ISSN

1044-5803

Volume

158:109958

Page(s)

1 - 7

View this publication at Norwegian Research Information Repository