Microstructure and mechanical properties of Hf-Nb-Ta-Ti-Zr refractory high-entropy alloys fabricated by laser directed energy deposition
The laser-directed energy deposition (LDED) additive manufacturing of Hf-Nb-Ta-Ti-Zr refractory high-entropy alloys (RHEAs) offers a pathway to achieving superior mechanical properties through microstructural control. This study systematically investigates the influence of laser power and scanning s...
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Elsevier
2025-05-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785425011974 |
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| author | Xiaoxiao Wang Bo Yao Yunquan Li Yichen Xu Yuye Wu Qianyong Zhu Shiteng Zhao Mingxi Li Ruixiao Zheng Keyu Yan Menghan Zhang Hao Yin Long Cheng Guang-Hong Lu Haotian Zhang Haichen Wu Xin Lin Jingmin Wang Chengbao Jiang |
| author_facet | Xiaoxiao Wang Bo Yao Yunquan Li Yichen Xu Yuye Wu Qianyong Zhu Shiteng Zhao Mingxi Li Ruixiao Zheng Keyu Yan Menghan Zhang Hao Yin Long Cheng Guang-Hong Lu Haotian Zhang Haichen Wu Xin Lin Jingmin Wang Chengbao Jiang |
| author_sort | Xiaoxiao Wang |
| collection | DOAJ |
| description | The laser-directed energy deposition (LDED) additive manufacturing of Hf-Nb-Ta-Ti-Zr refractory high-entropy alloys (RHEAs) offers a pathway to achieving superior mechanical properties through microstructural control. This study systematically investigates the influence of laser power and scanning speed on grain size evolution, ranging from 38 μm to 143 μm, and correlates these variations with mechanical performance. Finite element (FE) modeling elucidates the thermal field distribution and its role in grain refinement. The findings reveal a strong interplay between microstructural morphology and mechanical properties, with the finest grain size (38 μm) exhibiting an optimal synergy of high yield strength (1123 MPa) and fracture elongation (12.0 %). Cellular structures enhance strength and ductility by restricting dislocation motion, whereas dendritic structures induce strain localization, leading to premature failure. In contrast, equiaxed microstructures homogenize deformation, improving ductility at the expense of strength. These insights establish a framework for optimizing LDED process parameters to tailor the microstructure and mechanical properties of high-performance RHEAs. |
| format | Article |
| id | doaj-art-8579765c835d465896e7b4b18a592357 |
| institution | OA Journals |
| issn | 2238-7854 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-8579765c835d465896e7b4b18a5923572025-08-20T01:51:48ZengElsevierJournal of Materials Research and Technology2238-78542025-05-01368136814510.1016/j.jmrt.2025.04.333Microstructure and mechanical properties of Hf-Nb-Ta-Ti-Zr refractory high-entropy alloys fabricated by laser directed energy depositionXiaoxiao Wang0Bo Yao1Yunquan Li2Yichen Xu3Yuye Wu4Qianyong Zhu5Shiteng Zhao6Mingxi Li7Ruixiao Zheng8Keyu Yan9Menghan Zhang10Hao Yin11Long Cheng12Guang-Hong Lu13Haotian Zhang14Haichen Wu15Xin Lin16Jingmin Wang17Chengbao Jiang18Key Laboratory of Aerospace Materials and Performance (Ministry of Education), School of Materials Science and Engineering, Beihang University, Beijing, 100191, PR ChinaState Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, PR ChinaKey Laboratory of Aerospace Materials and Performance (Ministry of Education), School of Materials Science and Engineering, Beihang University, Beijing, 100191, PR ChinaKey Laboratory of Aerospace Materials and Performance (Ministry of Education), School of Materials Science and Engineering, Beihang University, Beijing, 100191, PR ChinaKey Laboratory of Aerospace Materials and Performance (Ministry of Education), School of Materials Science and Engineering, Beihang University, Beijing, 100191, PR China; Corresponding author.Key Laboratory of Aerospace Materials and Performance (Ministry of Education), School of Materials Science and Engineering, Beihang University, Beijing, 100191, PR ChinaKey Laboratory of Aerospace Materials and Performance (Ministry of Education), School of Materials Science and Engineering, Beihang University, Beijing, 100191, PR China; Corresponding author.Key Laboratory of Aerospace Materials and Performance (Ministry of Education), School of Materials Science and Engineering, Beihang University, Beijing, 100191, PR ChinaKey Laboratory of Aerospace Materials and Performance (Ministry of Education), School of Materials Science and Engineering, Beihang University, Beijing, 100191, PR ChinaKey Laboratory of Aerospace Materials and Performance (Ministry of Education), School of Materials Science and Engineering, Beihang University, Beijing, 100191, PR ChinaKey Laboratory of Aerospace Materials and Performance (Ministry of Education), School of Materials Science and Engineering, Beihang University, Beijing, 100191, PR ChinaSchool of Physics and Nuclear Engineering, Beihang University, Beijing, 100191, PR ChinaSchool of Physics and Nuclear Engineering, Beihang University, Beijing, 100191, PR ChinaSchool of Physics and Nuclear Engineering, Beihang University, Beijing, 100191, PR ChinaKey Laboratory of Aerospace Materials and Performance (Ministry of Education), School of Materials Science and Engineering, Beihang University, Beijing, 100191, PR ChinaAnalytical Center, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, PR ChinaState Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, PR China; Corresponding author.Key Laboratory of Aerospace Materials and Performance (Ministry of Education), School of Materials Science and Engineering, Beihang University, Beijing, 100191, PR ChinaKey Laboratory of Aerospace Materials and Performance (Ministry of Education), School of Materials Science and Engineering, Beihang University, Beijing, 100191, PR ChinaThe laser-directed energy deposition (LDED) additive manufacturing of Hf-Nb-Ta-Ti-Zr refractory high-entropy alloys (RHEAs) offers a pathway to achieving superior mechanical properties through microstructural control. This study systematically investigates the influence of laser power and scanning speed on grain size evolution, ranging from 38 μm to 143 μm, and correlates these variations with mechanical performance. Finite element (FE) modeling elucidates the thermal field distribution and its role in grain refinement. The findings reveal a strong interplay between microstructural morphology and mechanical properties, with the finest grain size (38 μm) exhibiting an optimal synergy of high yield strength (1123 MPa) and fracture elongation (12.0 %). Cellular structures enhance strength and ductility by restricting dislocation motion, whereas dendritic structures induce strain localization, leading to premature failure. In contrast, equiaxed microstructures homogenize deformation, improving ductility at the expense of strength. These insights establish a framework for optimizing LDED process parameters to tailor the microstructure and mechanical properties of high-performance RHEAs.http://www.sciencedirect.com/science/article/pii/S2238785425011974Laser-directed energy depositionHf-Nb-Ta-Ti-ZrMicrostructureMechanical property |
| spellingShingle | Xiaoxiao Wang Bo Yao Yunquan Li Yichen Xu Yuye Wu Qianyong Zhu Shiteng Zhao Mingxi Li Ruixiao Zheng Keyu Yan Menghan Zhang Hao Yin Long Cheng Guang-Hong Lu Haotian Zhang Haichen Wu Xin Lin Jingmin Wang Chengbao Jiang Microstructure and mechanical properties of Hf-Nb-Ta-Ti-Zr refractory high-entropy alloys fabricated by laser directed energy deposition Journal of Materials Research and Technology Laser-directed energy deposition Hf-Nb-Ta-Ti-Zr Microstructure Mechanical property |
| title | Microstructure and mechanical properties of Hf-Nb-Ta-Ti-Zr refractory high-entropy alloys fabricated by laser directed energy deposition |
| title_full | Microstructure and mechanical properties of Hf-Nb-Ta-Ti-Zr refractory high-entropy alloys fabricated by laser directed energy deposition |
| title_fullStr | Microstructure and mechanical properties of Hf-Nb-Ta-Ti-Zr refractory high-entropy alloys fabricated by laser directed energy deposition |
| title_full_unstemmed | Microstructure and mechanical properties of Hf-Nb-Ta-Ti-Zr refractory high-entropy alloys fabricated by laser directed energy deposition |
| title_short | Microstructure and mechanical properties of Hf-Nb-Ta-Ti-Zr refractory high-entropy alloys fabricated by laser directed energy deposition |
| title_sort | microstructure and mechanical properties of hf nb ta ti zr refractory high entropy alloys fabricated by laser directed energy deposition |
| topic | Laser-directed energy deposition Hf-Nb-Ta-Ti-Zr Microstructure Mechanical property |
| url | http://www.sciencedirect.com/science/article/pii/S2238785425011974 |
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