Microstructure and Mechanical Behavior Comparison between Cast and Additive Friction Stir-Deposited High-Entropy Alloy Al<sub>0.35</sub>CoCrFeNi
High-entropy alloys (HEAs) are new alloy systems that leverage solid solution strengthening to develop high-strength structural materials. However, HEAs are typically cast alloys, which may suffer from large as-cast grains and entrapped porosity, allowing for opportunities to further refine the micr...
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MDPI AG
2024-02-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/17/4/910 |
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| author | Zackery McClelland Kyle Dunsford Brady Williams Haley Petersen Keivan Devami Mark Weaver J. Brian Jordan Paul G. Allison |
| author_facet | Zackery McClelland Kyle Dunsford Brady Williams Haley Petersen Keivan Devami Mark Weaver J. Brian Jordan Paul G. Allison |
| author_sort | Zackery McClelland |
| collection | DOAJ |
| description | High-entropy alloys (HEAs) are new alloy systems that leverage solid solution strengthening to develop high-strength structural materials. However, HEAs are typically cast alloys, which may suffer from large as-cast grains and entrapped porosity, allowing for opportunities to further refine the microstructure in a non-melting near-net shape solid-state additive manufacturing process, additive friction stir deposition (AFSD). The present research compares the microstructure and mechanical behavior of the as-deposited AFSD Al<sub>0.35</sub>CoCrFeNi to the cast heat-treated properties to assess its viability for structural applications for the first time. Scanning electron microscopy (SEM) revealed the development of fine particles along the layer interfaces of the deposit. Quasi-static and intermediate-rate compression testing of the deposited material revealed a significant strain-rate sensitivity with a difference in yield strength of ~400 MPa. Overall, the AFSD process greatly reduced the grain size for the Al<sub>0.35</sub>CoCrFeNi alloy and approximately doubled the strength at both quasi-static and intermediate strain rates. |
| first_indexed | 2024-03-07T22:23:05Z |
| format | Article |
| id | doaj.art-add36a97a29442139cb6e461251dee48 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-07T22:23:05Z |
| publishDate | 2024-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-add36a97a29442139cb6e461251dee482024-02-23T15:25:46ZengMDPI AGMaterials1996-19442024-02-0117491010.3390/ma17040910Microstructure and Mechanical Behavior Comparison between Cast and Additive Friction Stir-Deposited High-Entropy Alloy Al<sub>0.35</sub>CoCrFeNiZackery McClelland0Kyle Dunsford1Brady Williams2Haley Petersen3Keivan Devami4Mark Weaver5J. Brian Jordan6Paul G. Allison7US Army Engineer Research and Development Center, Vicksburg, MS 39180, USAGeneral Electric Aerospace, Cincinnati, OH 45215, USADepartment of Mechanical Engineering, Baylor University, Waco, TX 76706, USAUS Army Engineer Research and Development Center, Vicksburg, MS 39180, USADepartment of Mechanical Engineering, The University of Alabama, Tuscaloosa, AL 35487, USADepartment of Metallurgical Engineering, The University of Alabama, Tuscaloosa, AL 35487, USADepartment of Mechanical Engineering, Baylor University, Waco, TX 76706, USADepartment of Mechanical Engineering, Baylor University, Waco, TX 76706, USAHigh-entropy alloys (HEAs) are new alloy systems that leverage solid solution strengthening to develop high-strength structural materials. However, HEAs are typically cast alloys, which may suffer from large as-cast grains and entrapped porosity, allowing for opportunities to further refine the microstructure in a non-melting near-net shape solid-state additive manufacturing process, additive friction stir deposition (AFSD). The present research compares the microstructure and mechanical behavior of the as-deposited AFSD Al<sub>0.35</sub>CoCrFeNi to the cast heat-treated properties to assess its viability for structural applications for the first time. Scanning electron microscopy (SEM) revealed the development of fine particles along the layer interfaces of the deposit. Quasi-static and intermediate-rate compression testing of the deposited material revealed a significant strain-rate sensitivity with a difference in yield strength of ~400 MPa. Overall, the AFSD process greatly reduced the grain size for the Al<sub>0.35</sub>CoCrFeNi alloy and approximately doubled the strength at both quasi-static and intermediate strain rates.https://www.mdpi.com/1996-1944/17/4/910AlCoCrFeNi HEAadditive friction stir depositionmicrostructuremechanical propertystrength |
| spellingShingle | Zackery McClelland Kyle Dunsford Brady Williams Haley Petersen Keivan Devami Mark Weaver J. Brian Jordan Paul G. Allison Microstructure and Mechanical Behavior Comparison between Cast and Additive Friction Stir-Deposited High-Entropy Alloy Al<sub>0.35</sub>CoCrFeNi Materials AlCoCrFeNi HEA additive friction stir deposition microstructure mechanical property strength |
| title | Microstructure and Mechanical Behavior Comparison between Cast and Additive Friction Stir-Deposited High-Entropy Alloy Al<sub>0.35</sub>CoCrFeNi |
| title_full | Microstructure and Mechanical Behavior Comparison between Cast and Additive Friction Stir-Deposited High-Entropy Alloy Al<sub>0.35</sub>CoCrFeNi |
| title_fullStr | Microstructure and Mechanical Behavior Comparison between Cast and Additive Friction Stir-Deposited High-Entropy Alloy Al<sub>0.35</sub>CoCrFeNi |
| title_full_unstemmed | Microstructure and Mechanical Behavior Comparison between Cast and Additive Friction Stir-Deposited High-Entropy Alloy Al<sub>0.35</sub>CoCrFeNi |
| title_short | Microstructure and Mechanical Behavior Comparison between Cast and Additive Friction Stir-Deposited High-Entropy Alloy Al<sub>0.35</sub>CoCrFeNi |
| title_sort | microstructure and mechanical behavior comparison between cast and additive friction stir deposited high entropy alloy al sub 0 35 sub cocrfeni |
| topic | AlCoCrFeNi HEA additive friction stir deposition microstructure mechanical property strength |
| url | https://www.mdpi.com/1996-1944/17/4/910 |
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