Hierarchically heterogeneous microstructure enables ultrahigh-strength and good ductility in selective laser melted eutectic high-entropy alloys
Achieving favorable strength-ductility synergy has long been one of the main challenges for developing structural materials. The current work reports a selective laser melted eutectic high-entropy alloy with ultrahigh-strength (yield strength 1446 MPa, ultimate tensile strength 1737 MPa) and good du...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2023-05-01
|
| Series: | Journal of Materials Research and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785423006877 |
| _version_ | 1827920376980570112 |
|---|---|
| author | Zhenghong Fu Yong Zhang Zhiming Li Yiping Lu Xiaoxiang Wu Hui Wang |
| author_facet | Zhenghong Fu Yong Zhang Zhiming Li Yiping Lu Xiaoxiang Wu Hui Wang |
| author_sort | Zhenghong Fu |
| collection | DOAJ |
| description | Achieving favorable strength-ductility synergy has long been one of the main challenges for developing structural materials. The current work reports a selective laser melted eutectic high-entropy alloy with ultrahigh-strength (yield strength 1446 MPa, ultimate tensile strength 1737 MPa) and good ductility (elongation 11%), achieved by tuning the hierarchically heterogeneous microstructures from micro-to nano-scale. Both of nano-sized B2 and L12 phases effectively hinder the dislocation motion and thus significantly improve the strengths. The cellular face-centered cubic matrix ensures the uniform deformation of the alloy, and the possible brittle failure of the hard B2 phase is alleviated by Cr-rich clusters. |
| first_indexed | 2024-03-13T04:09:39Z |
| format | Article |
| id | doaj.art-b16d3c89d4d84bc0983d2112b833eef4 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-03-13T04:09:39Z |
| publishDate | 2023-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-b16d3c89d4d84bc0983d2112b833eef42023-06-21T06:56:21ZengElsevierJournal of Materials Research and Technology2238-78542023-05-012433003308Hierarchically heterogeneous microstructure enables ultrahigh-strength and good ductility in selective laser melted eutectic high-entropy alloysZhenghong Fu0Yong Zhang1Zhiming Li2Yiping Lu3Xiaoxiang Wu4Hui Wang5Applied Mechanics and Structure Safety Key Laboratory of Sichuan Province, School of Mechanics and Aerospace Engineering, Southwest Jiaotong University, Chengdu, 611756, ChinaSchool of Materials Science and Engineering, Central South University, Changsha, 410083, China; Corresponding author.School of Materials Science and Engineering, Central South University, Changsha, 410083, ChinaHigh Entropy Alloy Material Engineering Research Center (Liaoning Province), School of Materials Science and Engineering, Dalian University of Technology, Dalian, 116024, ChinaSchool of Iron and Steel, Soochow University, Suzhou, 215137, ChinaInterdisciplinary Materials Research Center, Institute for Advanced Study, Chengdu University, Chengdu, 610106, ChinaAchieving favorable strength-ductility synergy has long been one of the main challenges for developing structural materials. The current work reports a selective laser melted eutectic high-entropy alloy with ultrahigh-strength (yield strength 1446 MPa, ultimate tensile strength 1737 MPa) and good ductility (elongation 11%), achieved by tuning the hierarchically heterogeneous microstructures from micro-to nano-scale. Both of nano-sized B2 and L12 phases effectively hinder the dislocation motion and thus significantly improve the strengths. The cellular face-centered cubic matrix ensures the uniform deformation of the alloy, and the possible brittle failure of the hard B2 phase is alleviated by Cr-rich clusters.http://www.sciencedirect.com/science/article/pii/S2238785423006877Strength-ductile synergyEutectic high-entropy alloySelective laser meltingHierarchically heterogeneous microstructuresDislocation motion |
| spellingShingle | Zhenghong Fu Yong Zhang Zhiming Li Yiping Lu Xiaoxiang Wu Hui Wang Hierarchically heterogeneous microstructure enables ultrahigh-strength and good ductility in selective laser melted eutectic high-entropy alloys Journal of Materials Research and Technology Strength-ductile synergy Eutectic high-entropy alloy Selective laser melting Hierarchically heterogeneous microstructures Dislocation motion |
| title | Hierarchically heterogeneous microstructure enables ultrahigh-strength and good ductility in selective laser melted eutectic high-entropy alloys |
| title_full | Hierarchically heterogeneous microstructure enables ultrahigh-strength and good ductility in selective laser melted eutectic high-entropy alloys |
| title_fullStr | Hierarchically heterogeneous microstructure enables ultrahigh-strength and good ductility in selective laser melted eutectic high-entropy alloys |
| title_full_unstemmed | Hierarchically heterogeneous microstructure enables ultrahigh-strength and good ductility in selective laser melted eutectic high-entropy alloys |
| title_short | Hierarchically heterogeneous microstructure enables ultrahigh-strength and good ductility in selective laser melted eutectic high-entropy alloys |
| title_sort | hierarchically heterogeneous microstructure enables ultrahigh strength and good ductility in selective laser melted eutectic high entropy alloys |
| topic | Strength-ductile synergy Eutectic high-entropy alloy Selective laser melting Hierarchically heterogeneous microstructures Dislocation motion |
| url | http://www.sciencedirect.com/science/article/pii/S2238785423006877 |
| work_keys_str_mv | AT zhenghongfu hierarchicallyheterogeneousmicrostructureenablesultrahighstrengthandgoodductilityinselectivelasermeltedeutectichighentropyalloys AT yongzhang hierarchicallyheterogeneousmicrostructureenablesultrahighstrengthandgoodductilityinselectivelasermeltedeutectichighentropyalloys AT zhimingli hierarchicallyheterogeneousmicrostructureenablesultrahighstrengthandgoodductilityinselectivelasermeltedeutectichighentropyalloys AT yipinglu hierarchicallyheterogeneousmicrostructureenablesultrahighstrengthandgoodductilityinselectivelasermeltedeutectichighentropyalloys AT xiaoxiangwu hierarchicallyheterogeneousmicrostructureenablesultrahighstrengthandgoodductilityinselectivelasermeltedeutectichighentropyalloys AT huiwang hierarchicallyheterogeneousmicrostructureenablesultrahighstrengthandgoodductilityinselectivelasermeltedeutectichighentropyalloys |