SKM 2023 – scientific programme
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MM: Fachverband Metall- und Materialphysik
MM 17: Phase Transformations: Microstructural Transformations
MM 17.3: Talk
Tuesday, March 28, 2023, 10:45–11:00, SCH A 118
Simultaneous structural and thermal characterisation of Zr-based bulk metallic glasses via synchrotron X-ray diffraction and fast differential scanning calorimetry — •Štefan T. Stanko1, Jürgen E.K. Schawe1,2, and Jörg F. Löffler1 — 1Laboratory of Metal Physics and Technology, Department of Materials, ETH Zurich, 8093 Zurich, Switzerland — 2Mettler-Toledo GmbH, Analytical, 8606 Nänikon, Switzerland
Fast differential scanning calorimetry (FDSC) experiments were performed to measure time-temperature-transformation (TTT) diagrams of Zr-based bulk metallic glasses used for additive manufacturing. The alloys were measured in powder and bulk form, and multiple crystallisation events upon cooling were observed in both cases. The fast differential scanning calorimeter was modified to allow its integration into a synchrotron X-ray beamline and thus to characterise in situ metastable phase transformations. With the in situ setup it was possible to simultaneously investigate the structure of the phases involved and their transformation kinetics. The results were correlated with the oxygen content of the alloys, with the aim of optimising the additive manufacturing process of metallic parts.