Cao, LG, Hou, PY, Nassar, A et al. (1 more author) (2021) Dendritic Growth of Rapid-Solidified Eutectic High-Entropy Alloy. In: Materials Science Forum. 21st China Materials Conference and Exhibition 2020, 19-21 Nov 2020, Qingdao, China. Trans Tech Publications , pp. 46-50.
Abstract
Mould casting and drop-tube techniques were used to solidify a AlCoCrFeNi2.1 eutectic high-entropy alloy under conditions of high cooling rate. The samples obtained from two different methods present the same phase constituent, FCC and B2 phases. During mould casting experiments the alloy almost solidified into the eutectic structure consisting of lamellar and anomalous morphology, with a tiny fraction of cellular and dendrite morphology being observed at certain sites of the sample surface due to the corresponding high cooling rate. Instead, during drop-tube experiments a typical, coarse dendrite structure of FCC single phase was formed across the entire 106-150 μm particle. The cellular structure can also be formed directly from the melt. The rest region solidified into the general eutectic morphology as was observed in the casting rods. The results clearly indicate the transition from coupled eutectic growth to single-phase dendrite growth with increasing departures from equilibrium for the multi-component AlCoCrFeNi2.1 eutectic high-entropy alloy.
Metadata
Item Type: | Proceedings Paper |
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Authors/Creators: |
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Keywords: | Dendrite Growth; Eutectic High-Entropy Alloy; Rapid Solidification |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemical & Process Engineering (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 12 May 2021 13:01 |
Last Modified: | 26 Oct 2023 16:18 |
Status: | Published |
Publisher: | Trans Tech Publications |
Identification Number: | 10.4028/www.scientific.net/MSF.1035.46 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:173637 |