Title
Real-time atomic scale imaging of nanostructural evolution in aluminum alloys Real-time atomic scale imaging of nanostructural evolution in aluminum alloys
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
Washington ,
Subject
Physics
Chemistry
Engineering sciences. Technology
Source (journal)
Nano letters / American Chemical Society. - Washington
Volume/pages
14(2014) :1 , p. 384-389
ISSN
1530-6984
ISI
000329586700061
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
We present a new approach to study the three-dimensional compositional and structural evolution of metal alloys during heat treatments such as commonly used for improving overall material properties. It relies on in situ heating in a high-resolution scanning transmission electron microscope (STEM). The approach is demonstrated using a commercial Al alloy AA2024 at 100-240 degrees C, showing in unparalleled detail where and how precipitates nucleate, grow,or dissolve. The observed size evolution of individual precipitates enables a separation between nucleation and growth phenomena, necessary for the development of refined growth models. We conclude that the in situ heating STEM approach opens a route to a much faster determination of the interplay between local compositions, heat treatments, microstructure, and mechanical properties of new alloys.
E-info
https://repository.uantwerpen.be/docman/iruaauth/6160d7/ac46991.pdf
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