Obtaining strength-ductility combination in a laser additive manufactured (FeCoNi)86Al7Ti7 high-entropy alloy at cryogenic temperature
High-entropy alloys (HEAs) are known for their distinctive microstructural features, outstanding performance, and potential applications, establishing them as novel metallic materials. Studies indicate that face-centered cubic HEAs generally offer increased strength and toughness at lower temperatur...
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Elsevier
2025-01-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785424029284 |
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| author | Kaiqiang Xie Yacheng Fang Pan Ma Hong Yang Shiguang Wan Konda Gokuldoss Prashanth Piter Gargarella Yongkun Mu Gang Wang Yandong Jia |
| author_facet | Kaiqiang Xie Yacheng Fang Pan Ma Hong Yang Shiguang Wan Konda Gokuldoss Prashanth Piter Gargarella Yongkun Mu Gang Wang Yandong Jia |
| author_sort | Kaiqiang Xie |
| collection | DOAJ |
| description | High-entropy alloys (HEAs) are known for their distinctive microstructural features, outstanding performance, and potential applications, establishing them as novel metallic materials. Studies indicate that face-centered cubic HEAs generally offer increased strength and toughness at lower temperatures, suitable for cryogenic applications. This work on (FeCoNi)86Al7Ti7 HEA fabricated using powder bed fusion (PBF) studies the phase composition, microstructure, and mechanical properties at both room and cryogenic temperatures (298 K and 77 K). The PBF HEA exhibits a hierarchical microstructure with columnar grains, Ti-enriched cellular substructures entangled with high-density dislocations, and L21 nanoprecipitates, contributing to an excellent strength-ductility combination at room temperature. Notably, as the temperature decreases from 298 K to 77 K, both strength and ductility increase, with a higher yield strength of ∼1.0 GPa, ultimate tensile strength of ∼1.55 GPa, and ductility of ∼42%. Dislocation strengthening is dominant at both room and cryogenic temperatures, with dislocation slip as the primary deformation mechanism at 298 K and a combination of dislocation slips and stacking faults at 77 K. |
| format | Article |
| id | doaj-art-a20e51f8229d45e9a07f8e1336603222 |
| institution | Kabale University |
| issn | 2238-7854 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-a20e51f8229d45e9a07f8e13366032222025-01-19T06:25:33ZengElsevierJournal of Materials Research and Technology2238-78542025-01-0134819831Obtaining strength-ductility combination in a laser additive manufactured (FeCoNi)86Al7Ti7 high-entropy alloy at cryogenic temperatureKaiqiang Xie0Yacheng Fang1Pan Ma2Hong Yang3Shiguang Wan4Konda Gokuldoss Prashanth5Piter Gargarella6Yongkun Mu7Gang Wang8Yandong Jia9School of Materials Science and Engineering, Shanghai University of Engineering Science, Shanghai, ChinaSchool of Materials Science and Engineering, Shanghai University of Engineering Science, Shanghai, ChinaSchool of Materials Science and Engineering, Shanghai University of Engineering Science, Shanghai, China; State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin, 150001, China; Corresponding author. School of Materials Science and Engineering, Shanghai University of Engineering Science, Shanghai, China.School of Materials Science and Engineering, Shanghai University of Engineering Science, Shanghai, ChinaSchool of Materials Science and Engineering, Shanghai University of Engineering Science, Shanghai, ChinaDepartment of Biosciences, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences, Chennai, 602117, India; Department of Mechanical and Industrial Engineering, Tallinn University of Technology, Ehitajate tee 5, 19086, Tallinn, EstoniaDepartment of Materials Engineering, Federal University of São Carlos, 13565-905, São Carlos, SP, Brazil; Center of Characterization and Development of Materials (CCDM), Federal University of São Carlos, 13565-905, São Carlos, SP, BrazilLaboratory for Microstructures, Institute of Materials, Shanghai University, Shanghai, 200444, ChinaLaboratory for Microstructures, Institute of Materials, Shanghai University, Shanghai, 200444, ChinaLaboratory for Microstructures, Institute of Materials, Shanghai University, Shanghai, 200444, China; Corresponding author.High-entropy alloys (HEAs) are known for their distinctive microstructural features, outstanding performance, and potential applications, establishing them as novel metallic materials. Studies indicate that face-centered cubic HEAs generally offer increased strength and toughness at lower temperatures, suitable for cryogenic applications. This work on (FeCoNi)86Al7Ti7 HEA fabricated using powder bed fusion (PBF) studies the phase composition, microstructure, and mechanical properties at both room and cryogenic temperatures (298 K and 77 K). The PBF HEA exhibits a hierarchical microstructure with columnar grains, Ti-enriched cellular substructures entangled with high-density dislocations, and L21 nanoprecipitates, contributing to an excellent strength-ductility combination at room temperature. Notably, as the temperature decreases from 298 K to 77 K, both strength and ductility increase, with a higher yield strength of ∼1.0 GPa, ultimate tensile strength of ∼1.55 GPa, and ductility of ∼42%. Dislocation strengthening is dominant at both room and cryogenic temperatures, with dislocation slip as the primary deformation mechanism at 298 K and a combination of dislocation slips and stacking faults at 77 K.http://www.sciencedirect.com/science/article/pii/S2238785424029284High entropy alloySelective laser meltingMicrostructureCryogenic mechanical propertyStacking fault |
| spellingShingle | Kaiqiang Xie Yacheng Fang Pan Ma Hong Yang Shiguang Wan Konda Gokuldoss Prashanth Piter Gargarella Yongkun Mu Gang Wang Yandong Jia Obtaining strength-ductility combination in a laser additive manufactured (FeCoNi)86Al7Ti7 high-entropy alloy at cryogenic temperature Journal of Materials Research and Technology High entropy alloy Selective laser melting Microstructure Cryogenic mechanical property Stacking fault |
| title | Obtaining strength-ductility combination in a laser additive manufactured (FeCoNi)86Al7Ti7 high-entropy alloy at cryogenic temperature |
| title_full | Obtaining strength-ductility combination in a laser additive manufactured (FeCoNi)86Al7Ti7 high-entropy alloy at cryogenic temperature |
| title_fullStr | Obtaining strength-ductility combination in a laser additive manufactured (FeCoNi)86Al7Ti7 high-entropy alloy at cryogenic temperature |
| title_full_unstemmed | Obtaining strength-ductility combination in a laser additive manufactured (FeCoNi)86Al7Ti7 high-entropy alloy at cryogenic temperature |
| title_short | Obtaining strength-ductility combination in a laser additive manufactured (FeCoNi)86Al7Ti7 high-entropy alloy at cryogenic temperature |
| title_sort | obtaining strength ductility combination in a laser additive manufactured feconi 86al7ti7 high entropy alloy at cryogenic temperature |
| topic | High entropy alloy Selective laser melting Microstructure Cryogenic mechanical property Stacking fault |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424029284 |
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