Laser powder bed fusion of Fe60(CoCrNiMn)40 medium-entropy alloy with excellent strength-ductility balance
In this study, Fe60(CoCrNiMn)40 medium-entropy alloy (MEA) was fabricated by laser powder bed fusion (LPBF) via mixing of pure Fe and FeCoCrNiMn powders, the processability, microstructure and mechanical properties were systematically investigated, and the mechanism of strengthening and toughening w...
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| Format: | Article |
| Language: | English |
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Elsevier
2024-02-01
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| Series: | Materials & Design |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0264127524000923 |
| _version_ | 1797301621814722560 |
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| author | Shengze Yang Yang Liu Hongyu Chen Yonggang Wang Konrad Kosiba |
| author_facet | Shengze Yang Yang Liu Hongyu Chen Yonggang Wang Konrad Kosiba |
| author_sort | Shengze Yang |
| collection | DOAJ |
| description | In this study, Fe60(CoCrNiMn)40 medium-entropy alloy (MEA) was fabricated by laser powder bed fusion (LPBF) via mixing of pure Fe and FeCoCrNiMn powders, the processability, microstructure and mechanical properties were systematically investigated, and the mechanism of strengthening and toughening were revealed through combination of experiments and molecular dynamics (MD) simulations. Results show that fraction of BCC phase decreased gradually with increasing volume energy density (VED), and thus heterostructue with varying FCC and BCC phases were produced through regulating the VED. The Fe60(CoCrNiMn)40 MEA (with scanning speeds of 700 and 800 mm/s) showed excellent strength-plasticity balance (e.g. 476 MPa, 612 MPa and 63 %) compared to the equiatomic FeCoCrNiMn HEA, which is ascribed to the synergistic strengthening and toughening effects involving the twinning induced plasticity (TWIP) and the reinforcement caused by the BCC phase (act as reinforced particle) embedded in the FCC matrix. |
| first_indexed | 2024-03-07T23:25:13Z |
| format | Article |
| id | doaj.art-de5304c209d649808367e2ee9f3296eb |
| institution | Directory Open Access Journal |
| issn | 0264-1275 |
| language | English |
| last_indexed | 2024-03-07T23:25:13Z |
| publishDate | 2024-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials & Design |
| spelling | doaj.art-de5304c209d649808367e2ee9f3296eb2024-02-21T05:24:17ZengElsevierMaterials & Design0264-12752024-02-01238112720Laser powder bed fusion of Fe60(CoCrNiMn)40 medium-entropy alloy with excellent strength-ductility balanceShengze Yang0Yang Liu1Hongyu Chen2Yonggang Wang3Konrad Kosiba4Faculty of Mechanical Engineering & Mechanics, Ningbo University, Ningbo 315211, ChinaFaculty of Mechanical Engineering & Mechanics, Ningbo University, Ningbo 315211, China; MOE Key Laboratory of Impact and Safety Engineering, Ningbo University, Ningbo 315211, China; Corresponding author at: Faculty of Mechanical Engineering & Mechanics, Ningbo University, Ningbo 315211, China.Faculty of Mechanical Engineering & Mechanics, Ningbo University, Ningbo 315211, China; MOE Key Laboratory of Impact and Safety Engineering, Ningbo University, Ningbo 315211, ChinaFaculty of Mechanical Engineering & Mechanics, Ningbo University, Ningbo 315211, China; MOE Key Laboratory of Impact and Safety Engineering, Ningbo University, Ningbo 315211, ChinaLeibniz Institute for Solid State and Materials Research Dresden, Institute for Complex Materials, Helmholtzstr. 20, 01069 Dresden, GermanyIn this study, Fe60(CoCrNiMn)40 medium-entropy alloy (MEA) was fabricated by laser powder bed fusion (LPBF) via mixing of pure Fe and FeCoCrNiMn powders, the processability, microstructure and mechanical properties were systematically investigated, and the mechanism of strengthening and toughening were revealed through combination of experiments and molecular dynamics (MD) simulations. Results show that fraction of BCC phase decreased gradually with increasing volume energy density (VED), and thus heterostructue with varying FCC and BCC phases were produced through regulating the VED. The Fe60(CoCrNiMn)40 MEA (with scanning speeds of 700 and 800 mm/s) showed excellent strength-plasticity balance (e.g. 476 MPa, 612 MPa and 63 %) compared to the equiatomic FeCoCrNiMn HEA, which is ascribed to the synergistic strengthening and toughening effects involving the twinning induced plasticity (TWIP) and the reinforcement caused by the BCC phase (act as reinforced particle) embedded in the FCC matrix.http://www.sciencedirect.com/science/article/pii/S0264127524000923Laser powder bed fusionHigh-entropy alloyHeterostructureMolecular dynamicsSynergistic strengthening and ductility |
| spellingShingle | Shengze Yang Yang Liu Hongyu Chen Yonggang Wang Konrad Kosiba Laser powder bed fusion of Fe60(CoCrNiMn)40 medium-entropy alloy with excellent strength-ductility balance Materials & Design Laser powder bed fusion High-entropy alloy Heterostructure Molecular dynamics Synergistic strengthening and ductility |
| title | Laser powder bed fusion of Fe60(CoCrNiMn)40 medium-entropy alloy with excellent strength-ductility balance |
| title_full | Laser powder bed fusion of Fe60(CoCrNiMn)40 medium-entropy alloy with excellent strength-ductility balance |
| title_fullStr | Laser powder bed fusion of Fe60(CoCrNiMn)40 medium-entropy alloy with excellent strength-ductility balance |
| title_full_unstemmed | Laser powder bed fusion of Fe60(CoCrNiMn)40 medium-entropy alloy with excellent strength-ductility balance |
| title_short | Laser powder bed fusion of Fe60(CoCrNiMn)40 medium-entropy alloy with excellent strength-ductility balance |
| title_sort | laser powder bed fusion of fe60 cocrnimn 40 medium entropy alloy with excellent strength ductility balance |
| topic | Laser powder bed fusion High-entropy alloy Heterostructure Molecular dynamics Synergistic strengthening and ductility |
| url | http://www.sciencedirect.com/science/article/pii/S0264127524000923 |
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