Microstructural features and functional properties of NiCuTiZrAl high entropy shape memory alloys
In the present study, the Ni25Cu25Ti35-XZr15AlX (X = 5, 7.5, 10, 12.5) high-entropy shape memory alloys (HESMAs) with the lower costs were designed and optimized. The results revealed that the pronounced segregation behavior existed in the as-casted NiCuTiZrAl high-entropy shape memory alloys, which...
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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/S2238785425007537 |
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| author | Haizhen Wang Bowen Jiang Haodong He Guoqiang Fu Bin Sun Xinnuo Liu Shangzhou Zhang Zhiyong Gao Xianglong Meng Xiaoyang Yi |
| author_facet | Haizhen Wang Bowen Jiang Haodong He Guoqiang Fu Bin Sun Xinnuo Liu Shangzhou Zhang Zhiyong Gao Xianglong Meng Xiaoyang Yi |
| author_sort | Haizhen Wang |
| collection | DOAJ |
| description | In the present study, the Ni25Cu25Ti35-XZr15AlX (X = 5, 7.5, 10, 12.5) high-entropy shape memory alloys (HESMAs) with the lower costs were designed and optimized. The results revealed that the pronounced segregation behavior existed in the as-casted NiCuTiZrAl high-entropy shape memory alloys, which resulted in the generation of dendrite-interdendrite structure. Among, the dendrite region was mainly comprised of B2 TiNi type matrix phase, while the NiAl-rich phase with BCC structure and a AlCu2Zr phase with FCC structure can be observed in interdendrite region. With Al content increasing, the volume fraction of B2 phase increased firstly and then decreased. In proportion, the mechanical properties of the as-casted Ni25Cu25Ti32Zr15AlX HESMAs firstly increased and then decreased with the increase of Al content. In contrast, the as-casted Ni25Cu25Ti25Zr15Al10 HESMAs exhibited a superior combination of higher compressive strength and microhardness as well as the excellent superelasticity with the recoverable strain of 5 % and the excellent cyclic stability, which can be the solution strengthening of multiple principle elements and precipitation strengthening of higher density of nano-scale precipitates. |
| format | Article |
| id | doaj-art-160f6d85b92b43ccab427a82287cd084 |
| institution | DOAJ |
| issn | 2238-7854 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-160f6d85b92b43ccab427a82287cd0842025-08-20T02:49:22ZengElsevierJournal of Materials Research and Technology2238-78542025-05-01361875189010.1016/j.jmrt.2025.03.243Microstructural features and functional properties of NiCuTiZrAl high entropy shape memory alloysHaizhen Wang0Bowen Jiang1Haodong He2Guoqiang Fu3Bin Sun4Xinnuo Liu5Shangzhou Zhang6Zhiyong Gao7Xianglong Meng8Xiaoyang Yi9Yantai Key Laboratory of Advanced Nuclear Energy Materials and Irradiation Technology, College of Nuclear Equipment & Nuclear Engineering, Yantai University, Yantai, 264005, ChinaYantai Key Laboratory of Advanced Nuclear Energy Materials and Irradiation Technology, College of Nuclear Equipment & Nuclear Engineering, Yantai University, Yantai, 264005, ChinaYantai Key Laboratory of Advanced Nuclear Energy Materials and Irradiation Technology, College of Nuclear Equipment & Nuclear Engineering, Yantai University, Yantai, 264005, ChinaYantai Key Laboratory of Advanced Nuclear Energy Materials and Irradiation Technology, College of Nuclear Equipment & Nuclear Engineering, Yantai University, Yantai, 264005, ChinaCollege of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin, 150001, ChinaYantai Key Laboratory of Advanced Nuclear Energy Materials and Irradiation Technology, College of Nuclear Equipment & Nuclear Engineering, Yantai University, Yantai, 264005, ChinaInstitute for Advanced Studies in Precision Materials, Yantai University, Yantai, 264005, China; Corresponding author.School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, 150001, China; Corresponding author.School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, 150001, ChinaYantai Key Laboratory of Advanced Nuclear Energy Materials and Irradiation Technology, College of Nuclear Equipment & Nuclear Engineering, Yantai University, Yantai, 264005, China; Corresponding author.In the present study, the Ni25Cu25Ti35-XZr15AlX (X = 5, 7.5, 10, 12.5) high-entropy shape memory alloys (HESMAs) with the lower costs were designed and optimized. The results revealed that the pronounced segregation behavior existed in the as-casted NiCuTiZrAl high-entropy shape memory alloys, which resulted in the generation of dendrite-interdendrite structure. Among, the dendrite region was mainly comprised of B2 TiNi type matrix phase, while the NiAl-rich phase with BCC structure and a AlCu2Zr phase with FCC structure can be observed in interdendrite region. With Al content increasing, the volume fraction of B2 phase increased firstly and then decreased. In proportion, the mechanical properties of the as-casted Ni25Cu25Ti32Zr15AlX HESMAs firstly increased and then decreased with the increase of Al content. In contrast, the as-casted Ni25Cu25Ti25Zr15Al10 HESMAs exhibited a superior combination of higher compressive strength and microhardness as well as the excellent superelasticity with the recoverable strain of 5 % and the excellent cyclic stability, which can be the solution strengthening of multiple principle elements and precipitation strengthening of higher density of nano-scale precipitates.http://www.sciencedirect.com/science/article/pii/S2238785425007537High entropy shape memory alloysMicrostructureMechanical propertiesSuperelasticityElastocaloric effect |
| spellingShingle | Haizhen Wang Bowen Jiang Haodong He Guoqiang Fu Bin Sun Xinnuo Liu Shangzhou Zhang Zhiyong Gao Xianglong Meng Xiaoyang Yi Microstructural features and functional properties of NiCuTiZrAl high entropy shape memory alloys Journal of Materials Research and Technology High entropy shape memory alloys Microstructure Mechanical properties Superelasticity Elastocaloric effect |
| title | Microstructural features and functional properties of NiCuTiZrAl high entropy shape memory alloys |
| title_full | Microstructural features and functional properties of NiCuTiZrAl high entropy shape memory alloys |
| title_fullStr | Microstructural features and functional properties of NiCuTiZrAl high entropy shape memory alloys |
| title_full_unstemmed | Microstructural features and functional properties of NiCuTiZrAl high entropy shape memory alloys |
| title_short | Microstructural features and functional properties of NiCuTiZrAl high entropy shape memory alloys |
| title_sort | microstructural features and functional properties of nicutizral high entropy shape memory alloys |
| topic | High entropy shape memory alloys Microstructure Mechanical properties Superelasticity Elastocaloric effect |
| url | http://www.sciencedirect.com/science/article/pii/S2238785425007537 |
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