In-Situ Study of Microstructure Evolution of Spinodal Decomposition in an Al-Rich High-Entropy Alloy
High-entropy alloys (HEAs) are materials which leverage the entropy of mixing to motivate the formation of single-phase solid solutions, even of immiscible elements. While these materials are well-recognized for their application to structural engineering, there is increasing interest in the use of...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2022-03-01
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| Series: | Frontiers in Materials |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fmats.2022.827333/full |
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| author | Cameron S. Jorgensen Louis J. Santodonato Louis J. Santodonato Kenneth C. Littrell Chih Hsiang Kuo Chanho Lee Raymond R. Unocic Peter K. Liaw Dustin A. Gilbert Dustin A. Gilbert Lisa M. DeBeer-Schmitt |
| author_facet | Cameron S. Jorgensen Louis J. Santodonato Louis J. Santodonato Kenneth C. Littrell Chih Hsiang Kuo Chanho Lee Raymond R. Unocic Peter K. Liaw Dustin A. Gilbert Dustin A. Gilbert Lisa M. DeBeer-Schmitt |
| author_sort | Cameron S. Jorgensen |
| collection | DOAJ |
| description | High-entropy alloys (HEAs) are materials which leverage the entropy of mixing to motivate the formation of single-phase solid solutions, even of immiscible elements. While these materials are well-recognized for their application to structural engineering, there is increasing interest in the use of HEAs for functional applications such as memory storage and energy devices. The current work investigates the HEA Al1.3CoCrCuFeNi, which has been previously shown to be single-phase at high temperatures, but undergoes phase separation at lower temperatures, transforming the structural and the functional properties. This phase separation is investigated at high temperatures with in-situ small angle neutron scattering (SANS) and scanning transmission electron microscopy (EDS). These techniques show that increasing the temperature up to 800°C, the microstructure of the HEA adiabatically disorders and abruptly homogenizes near 700°C, which is consistent with spinodal decomposition. Overall, the microstructural evolution proceeds mainly by the atomistic redistribution of the constituent elements within simple crystal lattices, producing coherent phase mixtures. |
| first_indexed | 2024-12-22T21:42:48Z |
| format | Article |
| id | doaj.art-7665c1065f384a5f8feab351e310f980 |
| institution | Directory Open Access Journal |
| issn | 2296-8016 |
| language | English |
| last_indexed | 2024-12-22T21:42:48Z |
| publishDate | 2022-03-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Materials |
| spelling | doaj.art-7665c1065f384a5f8feab351e310f9802022-12-21T18:11:33ZengFrontiers Media S.A.Frontiers in Materials2296-80162022-03-01910.3389/fmats.2022.827333827333In-Situ Study of Microstructure Evolution of Spinodal Decomposition in an Al-Rich High-Entropy AlloyCameron S. Jorgensen0Louis J. Santodonato1Louis J. Santodonato2Kenneth C. Littrell3Chih Hsiang Kuo4Chanho Lee5Raymond R. Unocic6Peter K. Liaw7Dustin A. Gilbert8Dustin A. Gilbert9Lisa M. DeBeer-Schmitt10Department of Materials Sciences and Engineering, The University of Tennessee, Knoxville, TN, United StatesDepartment of Materials Sciences and Engineering, The University of Tennessee, Knoxville, TN, United StatesNeutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, TN, United StatesNeutron Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN, United StatesDepartment of Materials Sciences and Engineering, The University of Tennessee, Knoxville, TN, United StatesDepartment of Materials Sciences and Engineering, The University of Tennessee, Knoxville, TN, United StatesCenter for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, United StatesDepartment of Materials Sciences and Engineering, The University of Tennessee, Knoxville, TN, United StatesDepartment of Materials Sciences and Engineering, The University of Tennessee, Knoxville, TN, United StatesDepartment of Physics and Astronomy, University of Tennessee, Knoxville, TN, United StatesNeutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, TN, United StatesHigh-entropy alloys (HEAs) are materials which leverage the entropy of mixing to motivate the formation of single-phase solid solutions, even of immiscible elements. While these materials are well-recognized for their application to structural engineering, there is increasing interest in the use of HEAs for functional applications such as memory storage and energy devices. The current work investigates the HEA Al1.3CoCrCuFeNi, which has been previously shown to be single-phase at high temperatures, but undergoes phase separation at lower temperatures, transforming the structural and the functional properties. This phase separation is investigated at high temperatures with in-situ small angle neutron scattering (SANS) and scanning transmission electron microscopy (EDS). These techniques show that increasing the temperature up to 800°C, the microstructure of the HEA adiabatically disorders and abruptly homogenizes near 700°C, which is consistent with spinodal decomposition. Overall, the microstructural evolution proceeds mainly by the atomistic redistribution of the constituent elements within simple crystal lattices, producing coherent phase mixtures.https://www.frontiersin.org/articles/10.3389/fmats.2022.827333/fullhigh-entropy alloy (HEA)in situspinodal decompositionmicrostructureSANS (small-angle neutron scattering) |
| spellingShingle | Cameron S. Jorgensen Louis J. Santodonato Louis J. Santodonato Kenneth C. Littrell Chih Hsiang Kuo Chanho Lee Raymond R. Unocic Peter K. Liaw Dustin A. Gilbert Dustin A. Gilbert Lisa M. DeBeer-Schmitt In-Situ Study of Microstructure Evolution of Spinodal Decomposition in an Al-Rich High-Entropy Alloy Frontiers in Materials high-entropy alloy (HEA) in situ spinodal decomposition microstructure SANS (small-angle neutron scattering) |
| title | In-Situ Study of Microstructure Evolution of Spinodal Decomposition in an Al-Rich High-Entropy Alloy |
| title_full | In-Situ Study of Microstructure Evolution of Spinodal Decomposition in an Al-Rich High-Entropy Alloy |
| title_fullStr | In-Situ Study of Microstructure Evolution of Spinodal Decomposition in an Al-Rich High-Entropy Alloy |
| title_full_unstemmed | In-Situ Study of Microstructure Evolution of Spinodal Decomposition in an Al-Rich High-Entropy Alloy |
| title_short | In-Situ Study of Microstructure Evolution of Spinodal Decomposition in an Al-Rich High-Entropy Alloy |
| title_sort | in situ study of microstructure evolution of spinodal decomposition in an al rich high entropy alloy |
| topic | high-entropy alloy (HEA) in situ spinodal decomposition microstructure SANS (small-angle neutron scattering) |
| url | https://www.frontiersin.org/articles/10.3389/fmats.2022.827333/full |
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