Size distribution and volume fraction of T1 phase precipitates from TEM images: Direct measurements and related correction

Dorin, Thomas, Donnadieu, Patricia, Chaix, Jean-Marc, Lefebvre, Williams, Geuser, Frederic D and Deschamps, Alexis 2015, Size distribution and volume fraction of T1 phase precipitates from TEM images: Direct measurements and related correction, Micron, vol. 78, pp. 19-27, doi: 10.1016/j.micron.2015.06.002.

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Title Size distribution and volume fraction of T1 phase precipitates from TEM images: Direct measurements and related correction
Author(s) Dorin, ThomasORCID iD for Dorin, Thomas orcid.org/0000-0002-1033-961X
Donnadieu, Patricia
Chaix, Jean-Marc
Lefebvre, Williams
Geuser, Frederic D
Deschamps, Alexis
Journal name Micron
Volume number 78
Start page 19
End page 27
Total pages 9
Publisher Elsevier
Place of publication Amsterdam, The Netherlands
Publication date 2015-11
ISSN 1878-4291
Keyword(s) Precipitates
Correction method
High angle dark field imaging
Atom probe tomography
Summary Transmission Electron Microscopy (TEM) can be used to measure the size distribution and volume fraction of fine scale precipitates in metallic systems. However, such measurements suffer from a number of artefacts that need to be accounted for, related to the finite thickness of the TEM foil and to the projected observation in two dimensions of the microstructure. We present a correction procedure to describe the 3D distribution of disc-like particles and apply this method to the plate-like T1 precipitates in an Al-Li-Cu alloy in two ageing conditions showing different particle morphologies. The precipitates were imaged in a High-Angular Annular Dark Field Microscope (HAADF-STEM). The corrected size distribution is further used to determine the precipitate volume fraction. Atom probe tomography (APT) is finally utilised as an alternative way to measure the precipitate volume fraction and test the validity of the electron microscopy results.
Language eng
DOI 10.1016/j.micron.2015.06.002
Field of Research 091207 Metals and Alloy Materials
020406 Surfaces and Structural Properties of Condensed Matter
0915 Interdisciplinary Engineering
0204 Condensed Matter Physics
0912 Materials Engineering
Socio Economic Objective 861205 Sheet Metal Products
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2015, Elsevier
Persistent URL http://hdl.handle.net/10536/DRO/DU:30079898

Document type: Journal Article
Collection: Institute for Frontier Materials
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