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Nano-sized Cu clusters in deeply undercooled CoCuFeNiTa high entropy alloy
M. R. Rahul, Sumanta Samal, A. Marshal, V. I.Nithin Balaji, ,
Published in Acta Materialia Inc
2020
Volume: 177
   
Pages: 58 - 64
Abstract
The non-equilibrium response of a high entropy alloy CoCuFeNiTa0.5 has been studied using undercooling as a control parameter. The solidification growth rates are rapid (30–50 m/s) at deep undercooling (>150 °C) and are comparable with conventional alloys. The elemental segregation especially that of Cu as predicted by phase field simulations in lower (<50 °C) undercooling regime matches with the experimental observations. This study indicates that even extreme non-equilibrium conditions during solidification could not avoid elemental segregation at the atomic scale. © 2019 Acta Materialia Inc.
About the journal
JournalScripta Materialia
PublisherActa Materialia Inc
ISSN13596462
Open AccessNo
Concepts (17)
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    Cobalt alloys
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    Copper
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    Entropy
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    HIGH-ENTROPY ALLOYS
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    Iron alloys
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    Phase separation
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    Solidification
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    TANTALUM ALLOYS
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    Atomic scale
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    Control parameters
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    Conventional alloys
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    ELEMENTAL SEGREGATION
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    GROWTH VELOCITY
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    Non equilibrium
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    NONEQUILIBRIUM CONDITIONS
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    PHASE-FIELD SIMULATION
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    UNDERCOOLING