Quasi in situ analytical TEM to investigate electrochemically induced microstructural changes in alloys: AA2024-T3 as an example

Journal article (2013)

Authors

S.R.K. Malladi QN/High Resolution Electron Microscopy
F.D. Tichelaar QN/High Resolution Electron Microscopy
Q. Xu QN/High Resolution Electron Microscopy
M. Wu QN/High Resolution Electron Microscopy
H. Terryn External organisation
J.M.C. Mol OLD Metals Processing, Microstructures and Properties
F Hannour External organisation
H.W. Zandbergen QN/High Resolution Electron Microscopy
Research Group
QN/High Resolution Electron Microscopy
More Info
expand_more

Published Date

2013

Language

Undefined/Unknown

Reuse Rights

Other than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license such as Creative Commons.

Research Group

QN/High Resolution Electron Microscopy

Abstract

A quasi in situ method using a specially developed holder is presented to follow electrochemically induced microstructural changes on a nanometre scale using analytical transmission electron microscopy (TEM). By following a specific specimen area after repeated exposure to oxygen bubbled through aqueous HCI of pH = 3, de-alloying of a grain-boundary precipitate of similar to 200 nm was observed by monitoring the changes in the EELS copper L-2,L-3-edge and EFTEM elemental maps. These results, supporting the existing models of de-alloying of copper rich precipitates in aluminium alloys, demonstrate the effectiveness of the quasi in situ specimen holder for analytical TEM studies of corrosion.