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

doi:10.1016/j.actamat.2022.118225

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

Chair of Nonferrous Metallurgy (520)

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Abstract

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 language	English
Article number	118225
Number of pages	9
Journal	Acta Materialia
Volume	239.2022
Issue number	15 October
Early online date	3 Aug 2022
DOIs	https://doi.org/10.1016/j.actamat.2022.118225
Publication status	Published - 15 Oct 2022

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10.1016/j.actamat.2022.118225

1-s2.0-S135964542200605X-mainFinal published version, 1.91 MBLicence: CC BY

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abstract = "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.",

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AU - Dumitraschkewitz, Phillip

AU - Tunes, Matheus

AU - Quick, Cameron R.

AU - Santa Rosa Coradini, Diego

AU - Kremmer, Thomas

AU - Ramasamy, Parthiban

AU - Uggowitzer, Peter

AU - Pogatscher, Stefan

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

Abstract

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