Breaking the strength-ductility trade-off via heterogeneous structure in FeCoCrNiMo0.2 high-entropy alloy
The synergistic effect between heterogeneous structures has been proved to enhance the strength and plasticity of alloys, especially in the context of single-phase face-centered cubic (FCC) high-entropy alloys with low stacking fault energy. This study explores the synergistic effects of heterogeneo...
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| Format: | Article |
| Language: | English |
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Elsevier
2024-03-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785424000371 |
| _version_ | 1797247848577761280 |
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| author | Fei Chen Fei Liu Yuan-Biao Tan Wei Shi Song Xiang |
| author_facet | Fei Chen Fei Liu Yuan-Biao Tan Wei Shi Song Xiang |
| author_sort | Fei Chen |
| collection | DOAJ |
| description | The synergistic effect between heterogeneous structures has been proved to enhance the strength and plasticity of alloys, especially in the context of single-phase face-centered cubic (FCC) high-entropy alloys with low stacking fault energy. This study explores the synergistic effects of heterogeneous structures on the strength and plasticity of single-phase FCC FeCoCrNiMo0.2 high-entropy alloys. Through a combination of cryogenic rolling and annealing at 1000 °C for 0.5 h (RA-1000), the alloy demonstrates exceptional strength-ductility synergy and work-hardening ability. The heterogeneous structure comprises fine grains, nano-scale rich- (Cr, Mo) σ phase, and high-density annealing twins. The interaction of σ precipitation and FCC matrix induces heterogeneous deformation-induced strengthening (HDI), while annealing twins and stacking faults act as barriers to dislocation movement, enhancing strength and ductility through a dynamic Hall-Petch effect. Additionally, chemically ordered structures, ordered L12 phase, and type 63 topologically close-packed phases in RA-1000 alloys contribute to improved strain hardening via anti-phase boundaries. This work provides valuable insights for designing multi-scale heterogeneous structures to strengthen high-entropy alloys. |
| first_indexed | 2024-03-08T12:51:58Z |
| format | Article |
| id | doaj.art-01dd7f32c2794906b3148c05e688e4e5 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-04-24T20:05:13Z |
| publishDate | 2024-03-01 |
| publisher | Elsevier |
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| series | Journal of Materials Research and Technology |
| spelling | doaj.art-01dd7f32c2794906b3148c05e688e4e52024-03-24T06:57:09ZengElsevierJournal of Materials Research and Technology2238-78542024-03-0129265275Breaking the strength-ductility trade-off via heterogeneous structure in FeCoCrNiMo0.2 high-entropy alloyFei Chen0Fei Liu1Yuan-Biao Tan2Wei Shi3Song Xiang4Guizhou Key Laboratory of Materials Mechanical Behavior and Microstructure, National & Local Joint Engineering Laboratory for High-Performance Metal Structure Material and Advanced Manufacturing Technology, College of Materials and Metallurgy, Guizhou University, Guiyang, 550025, PR ChinaCorresponding author.; Guizhou Key Laboratory of Materials Mechanical Behavior and Microstructure, National & Local Joint Engineering Laboratory for High-Performance Metal Structure Material and Advanced Manufacturing Technology, College of Materials and Metallurgy, Guizhou University, Guiyang, 550025, PR ChinaGuizhou Key Laboratory of Materials Mechanical Behavior and Microstructure, National & Local Joint Engineering Laboratory for High-Performance Metal Structure Material and Advanced Manufacturing Technology, College of Materials and Metallurgy, Guizhou University, Guiyang, 550025, PR ChinaGuizhou Key Laboratory of Materials Mechanical Behavior and Microstructure, National & Local Joint Engineering Laboratory for High-Performance Metal Structure Material and Advanced Manufacturing Technology, College of Materials and Metallurgy, Guizhou University, Guiyang, 550025, PR ChinaCorresponding author.; Guizhou Key Laboratory of Materials Mechanical Behavior and Microstructure, National & Local Joint Engineering Laboratory for High-Performance Metal Structure Material and Advanced Manufacturing Technology, College of Materials and Metallurgy, Guizhou University, Guiyang, 550025, PR ChinaThe synergistic effect between heterogeneous structures has been proved to enhance the strength and plasticity of alloys, especially in the context of single-phase face-centered cubic (FCC) high-entropy alloys with low stacking fault energy. This study explores the synergistic effects of heterogeneous structures on the strength and plasticity of single-phase FCC FeCoCrNiMo0.2 high-entropy alloys. Through a combination of cryogenic rolling and annealing at 1000 °C for 0.5 h (RA-1000), the alloy demonstrates exceptional strength-ductility synergy and work-hardening ability. The heterogeneous structure comprises fine grains, nano-scale rich- (Cr, Mo) σ phase, and high-density annealing twins. The interaction of σ precipitation and FCC matrix induces heterogeneous deformation-induced strengthening (HDI), while annealing twins and stacking faults act as barriers to dislocation movement, enhancing strength and ductility through a dynamic Hall-Petch effect. Additionally, chemically ordered structures, ordered L12 phase, and type 63 topologically close-packed phases in RA-1000 alloys contribute to improved strain hardening via anti-phase boundaries. This work provides valuable insights for designing multi-scale heterogeneous structures to strengthen high-entropy alloys.http://www.sciencedirect.com/science/article/pii/S2238785424000371High-entropy alloysHeterogeneous structureStrength and ductilityTrade-offσ precipitates |
| spellingShingle | Fei Chen Fei Liu Yuan-Biao Tan Wei Shi Song Xiang Breaking the strength-ductility trade-off via heterogeneous structure in FeCoCrNiMo0.2 high-entropy alloy Journal of Materials Research and Technology High-entropy alloys Heterogeneous structure Strength and ductility Trade-off σ precipitates |
| title | Breaking the strength-ductility trade-off via heterogeneous structure in FeCoCrNiMo0.2 high-entropy alloy |
| title_full | Breaking the strength-ductility trade-off via heterogeneous structure in FeCoCrNiMo0.2 high-entropy alloy |
| title_fullStr | Breaking the strength-ductility trade-off via heterogeneous structure in FeCoCrNiMo0.2 high-entropy alloy |
| title_full_unstemmed | Breaking the strength-ductility trade-off via heterogeneous structure in FeCoCrNiMo0.2 high-entropy alloy |
| title_short | Breaking the strength-ductility trade-off via heterogeneous structure in FeCoCrNiMo0.2 high-entropy alloy |
| title_sort | breaking the strength ductility trade off via heterogeneous structure in fecocrnimo0 2 high entropy alloy |
| topic | High-entropy alloys Heterogeneous structure Strength and ductility Trade-off σ precipitates |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424000371 |
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