MEMS-Based in situ electron-microscopy investigation of rapid solidification and heat treatment on eutectic Al-Cu

Phillip Dumitraschkewitz, Matheus Tunes, Cameron R. Quick, Diego Santa Rosa Coradini, Thomas Kremmer, Parthiban Ramasamy, Peter Uggowitzer, Stefan Pogatscher

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The solidification behavior of a eutectic AlCu specimen is investigated via in situ scanning transmission electron microscope (STEM) experiments. Solidification conditions are varied by imposing various cooling conditions via a micro-electro-mechanical system (MEMS) based membrane. The methodology allows the use of material processed by a melting and casting route close to industrial metallurgically fabricated ma- terial for in situ STEM solidification studies. Different rapid solidification morphologies could be obtained solely on a single specimen by the demonstrated strategy. Additional post-solidification heat treatments are investigated in terms of observation of spheroidization of lamellas during annealing at elevated tem- peratures.
Original languageEnglish
Article number118225
Number of pages9
JournalActa Materialia
Issue number15 October
Early online date3 Aug 2022
Publication statusPublished - 15 Oct 2022

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