Real-time Atomic Scale Imaging of Nanostructural Evolution in Aluminum Alloys

SRK Malladi, Q Xu, MA van Huis, FD Tichelaar, KJ Batenburg, E Yucelen, B Dubiel, A Czyrska-Filemonowicz, HW Zandbergen

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    26 Citations (Scopus)


    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.
    Original languageUndefined/Unknown
    Pages (from-to)384-389
    Number of pages6
    JournalNano Letters: a journal dedicated to nanoscience and nanotechnology
    Issue number1
    Publication statusPublished - 2014

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