High-temperature transformations in Al-Li-based alloy studied by ACOM-TEM during in-situ heating

Al-Li-based alloy of a third-generation containing 3.71% Cu, 0.91% Li, 0.31% Mg, 0.15% Zr, and 0.05% Fe was prepared by twin-roll and mold casting. Thin specimens were in-situ annealed in TEM up to 450 °C, and the transformation of boundary eutectic particles was monitored. The combination of TEM im...

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Bibliographic Details
Main Authors: Bajtošová, L., Křivská, B., Králík, R., Šlapáková, M., Grydin, O., Stolbchenko, M., Schaper, M., Cieslar, M.
Format: Conference Proceeding
Language:English
Subjects:
Copper
Detectors
High temperature
Iron
Lithium base alloys
Twin roll casting
Zirconium
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Summary:Al-Li-based alloy of a third-generation containing 3.71% Cu, 0.91% Li, 0.31% Mg, 0.15% Zr, and 0.05% Fe was prepared by twin-roll and mold casting. Thin specimens were in-situ annealed in TEM up to 450 °C, and the transformation of boundary eutectic particles was monitored. The combination of TEM images with signals from several detectors, including conventional STEM and SEM detectors and ACOM-TEM system, provided complex information about the decomposition of primary phase particles and their transformation into new ones. Dissolution of complex Al-Cu-Li primary particles occurs above 400°C, and it is accompanied by a formation of Al-Cu-Li and Al-Cu phases.
ISSN:0094-243X
1551-7616
DOI:10.1063/5.0199550