Multi-layered heterostructured CoCrFeMnNi high-entropy alloy processed using direct energy deposition and ultrasonic nanocrystalline surface modification
The advantages of heterostructured materials as structural materials include superior mechanical properties and the ability to tailor the strength-ductility combination via microstructure customization. To maximize heterostructure effects, this study combined direct energy deposition and ultrasonic...
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| Format: | Article |
| Language: | English |
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Elsevier
2022-11-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785422016374 |
| _version_ | 1797980262690193408 |
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| author | Gang Hee Gu Rae Eon Kim Eun Seong Kim Jungwan Lee Auezhan Amanov Hyoung Seop Kim |
| author_facet | Gang Hee Gu Rae Eon Kim Eun Seong Kim Jungwan Lee Auezhan Amanov Hyoung Seop Kim |
| author_sort | Gang Hee Gu |
| collection | DOAJ |
| description | The advantages of heterostructured materials as structural materials include superior mechanical properties and the ability to tailor the strength-ductility combination via microstructure customization. To maximize heterostructure effects, this study combined direct energy deposition and ultrasonic nanocrystalline surface modification processes to create a CoCrFeMnNi equiatomic high-entropy alloy with multi-layered microstructures. The fabricated CoCrFeMnNi high-entropy alloy has a novel microstructure composed of multiple layers of repetitive microstructures with heterogeneity and demonstrates a remarkable synergetic strengthening effect in comparison to conventional heterogeneous materials. The outstanding mechanical properties derived from various hard and soft layer interfaces, as well as the effects of each layer and interface, were quantitatively analyzed using grain-scale digital image correlation technology. By combining the direct energy deposition and ultrasonic nanocrystalline surface modification processes, this study presents a method for fabricating a new class of heterostructured materials with multi-layered microstructure that exhibit deformation heterogeneity and grain size heterogeneity. The multi-layered microstructure with multiple heterogeneous boundaries breaks the conventional wisdom regarding heterostructured materials having only one or two heterogeneous interfaces. |
| first_indexed | 2024-04-11T05:51:45Z |
| format | Article |
| id | doaj.art-0c33bed159e74a33855dff02998a1971 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-04-11T05:51:45Z |
| publishDate | 2022-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-0c33bed159e74a33855dff02998a19712022-12-22T04:42:01ZengElsevierJournal of Materials Research and Technology2238-78542022-11-012128802890Multi-layered heterostructured CoCrFeMnNi high-entropy alloy processed using direct energy deposition and ultrasonic nanocrystalline surface modificationGang Hee Gu0Rae Eon Kim1Eun Seong Kim2Jungwan Lee3Auezhan Amanov4Hyoung Seop Kim5Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of KoreaGraduate Institute of Ferrous Technology, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of KoreaDepartment of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of KoreaDepartment of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of KoreaDepartment of Mechanical Engineering, Sun Moon University, Asan 31460, Republic of KoreaDepartment of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea; Graduate Institute of Ferrous Technology, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea; Institute for Convergence Research and Education in Advanced Technology, Yonsei University, Seoul 03722, Republic of Korea; Corresponding author.The advantages of heterostructured materials as structural materials include superior mechanical properties and the ability to tailor the strength-ductility combination via microstructure customization. To maximize heterostructure effects, this study combined direct energy deposition and ultrasonic nanocrystalline surface modification processes to create a CoCrFeMnNi equiatomic high-entropy alloy with multi-layered microstructures. The fabricated CoCrFeMnNi high-entropy alloy has a novel microstructure composed of multiple layers of repetitive microstructures with heterogeneity and demonstrates a remarkable synergetic strengthening effect in comparison to conventional heterogeneous materials. The outstanding mechanical properties derived from various hard and soft layer interfaces, as well as the effects of each layer and interface, were quantitatively analyzed using grain-scale digital image correlation technology. By combining the direct energy deposition and ultrasonic nanocrystalline surface modification processes, this study presents a method for fabricating a new class of heterostructured materials with multi-layered microstructure that exhibit deformation heterogeneity and grain size heterogeneity. The multi-layered microstructure with multiple heterogeneous boundaries breaks the conventional wisdom regarding heterostructured materials having only one or two heterogeneous interfaces.http://www.sciencedirect.com/science/article/pii/S2238785422016374Direct energy depositionUltrasonic nanocrystalline surface modificationHigh-entropy alloyHeterostructured materialMicrostructural tailoring |
| spellingShingle | Gang Hee Gu Rae Eon Kim Eun Seong Kim Jungwan Lee Auezhan Amanov Hyoung Seop Kim Multi-layered heterostructured CoCrFeMnNi high-entropy alloy processed using direct energy deposition and ultrasonic nanocrystalline surface modification Journal of Materials Research and Technology Direct energy deposition Ultrasonic nanocrystalline surface modification High-entropy alloy Heterostructured material Microstructural tailoring |
| title | Multi-layered heterostructured CoCrFeMnNi high-entropy alloy processed using direct energy deposition and ultrasonic nanocrystalline surface modification |
| title_full | Multi-layered heterostructured CoCrFeMnNi high-entropy alloy processed using direct energy deposition and ultrasonic nanocrystalline surface modification |
| title_fullStr | Multi-layered heterostructured CoCrFeMnNi high-entropy alloy processed using direct energy deposition and ultrasonic nanocrystalline surface modification |
| title_full_unstemmed | Multi-layered heterostructured CoCrFeMnNi high-entropy alloy processed using direct energy deposition and ultrasonic nanocrystalline surface modification |
| title_short | Multi-layered heterostructured CoCrFeMnNi high-entropy alloy processed using direct energy deposition and ultrasonic nanocrystalline surface modification |
| title_sort | multi layered heterostructured cocrfemnni high entropy alloy processed using direct energy deposition and ultrasonic nanocrystalline surface modification |
| topic | Direct energy deposition Ultrasonic nanocrystalline surface modification High-entropy alloy Heterostructured material Microstructural tailoring |
| url | http://www.sciencedirect.com/science/article/pii/S2238785422016374 |
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