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Multislice image simulations of sheared needle‐like precipitates in an Al‐Mg‐Si alloy

Multislice image simulations of sheared needle‐like precipitates in an Al‐Mg‐Si alloy

Category
Academic article
Abstract
The image contrast of sheared needle‐like precipitates in the Al‐Mg‐Si alloy system is investigated with respect to shear‐plane positions, the number of shear‐planes, and the active matrix slip systems through multislice transmission electron microscopy image simulations and the frozen phonon approximation. It is found that annular dark field scanning transmission electron microscopy (ADF STEM) images are mostly affected by shear‐planes within a distance ∼6–18 unit cells from the specimen surface, whereas about 5–10 equidistant shear‐planes are required to produce clear differences in HRTEM images. The contrast of the images is affected by the Burgers vector of the slip, but not the slip plane. The simulation results are discussed and compared to experimental data.
Client
  • Research Council of Norway (RCN) / 237885
  • Research Council of Norway (RCN) / NN9158K
  • Research Council of Norway (RCN) / 269905
  • Research Council of Norway (RCN) / 197405
  • Research Council of Norway (RCN) / 231762
Language
English
Author(s)
Affiliation
  • Norwegian University of Science and Technology
  • SINTEF Industry / Materials and Nanotechnology
Year
2020
Published in
Journal of Microscopy
ISSN
0022-2720
Publisher
Blackwell Publishing
Volume
00
Issue
00