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HomeMaterials Science ForumMaterials Science Forum Vol. 1016Solid State Amorphization and Alloy Parameters for...

Solid State Amorphization and Alloy Parameters for High Entropy Alloys

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Abstract:

Fast electron irradiation can induce the solid-state amorphization (SSA) of many intermetallic compounds. The occurrence of SSA stimulated by fast electron irradiation was found in the Al_0.5TiZrPdCuNi high-entropy alloy (HEA). The relationship between the occurrence of SSA in intermetallic compounds under fast electron irradiation and the empirical alloy parameters for predicting the solid-solution-formation tendency in HEAs was discussed. The occurrence of SSA in intermetallic compounds was hardly predicted, only by the alloy parameters of δ or ΔH_mix, which have been widely used for predicting solid-solution formation in HEAs. All intermetallic compounds with ΔH_mix ≤ -35 kJ/mol and those with δ ≥ 12.5 exhibit the occurrence of SSA. This implies that the intermetallic compounds with a largely negative ΔH_mix value and a largely positive δ parameter are favorable for the occurrence of SSA.

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Periodical:

Materials Science Forum (Volume 1016)

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990-996

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https://doi.org/10.4028/www.scientific.net/MSF.1016.990

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Online since:

January 2021

Authors:

Takeshi Nagase*

Keywords:

High Entropy Alloys, High Voltage Electron Microscopy, Intermetallic Compounds, Solid State Amorphization

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