Mechanism of heterogeneous substrate stimulating growth for nickel-based single crystal superalloy
Minimizing the deviation of single-crystal (SX) primary orientation can significantly enhance the yield rate, service life, and performance of turbine blades or castings. Substrate stimulating method controls the deviation of <001> orientation within a narrower range by inducing nucleation of...
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| Format: | Article |
| Language: | English |
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Elsevier
2024-11-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785424027261 |
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| _version_ | 1846107699270385664 |
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| author | Binqiang Wang Senhong Chen Long Zeng Mingxu Xia Jianguo Li Kun Bu |
| author_facet | Binqiang Wang Senhong Chen Long Zeng Mingxu Xia Jianguo Li Kun Bu |
| author_sort | Binqiang Wang |
| collection | DOAJ |
| description | Minimizing the deviation of single-crystal (SX) primary orientation can significantly enhance the yield rate, service life, and performance of turbine blades or castings. Substrate stimulating method controls the deviation of <001> orientation within a narrower range by inducing nucleation of specific crystalline planes. In this study, during heterogeneous substrate stimulating growth for DD5 superalloy, the mechanism by which lattice misfit influences the orientation of new crystals were systematically elucidated. The study variables include substrate materials ((001) SX DD5, polycrystal DD5, and polycrystal Cu), orientations ((001), (101), (111)), cooling rates, and temperature. The target oriented grains were increased when the lattice misfit between the substrates of varying materials or orientations and new crystal were minimized. The melt undercooling decreases as the substrate cooling rate decreases, which can only stimulate the nucleation of crystalline planes with lower energy barriers (characterized by minimal lattice misfit). The thermal gradient in the melt decreases and the lattice misfit simultaneously decreases as the substrate temperature increases, these two factors jointly contribute to stimulating grains with lower lattice misfit. The substrate temperature leads to more pronounced variation in the proportion of target grains, than does the substrate cooling rate. |
| format | Article |
| id | doaj-art-417b70c0a30d4ef7b683972fdcb77a56 |
| institution | Kabale University |
| issn | 2238-7854 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-417b70c0a30d4ef7b683972fdcb77a562024-12-26T08:55:55ZengElsevierJournal of Materials Research and Technology2238-78542024-11-013384728481Mechanism of heterogeneous substrate stimulating growth for nickel-based single crystal superalloyBinqiang Wang0Senhong Chen1Long Zeng2Mingxu Xia3Jianguo Li4Kun Bu5Key Laboratory of High Performance Manufacturing for Aero Engine, Ministry of Industry and Information Technology, School of Mechanical Engineering, Northwestern Polytechnical University, Xi'an, 710072, Shannxi, ChinaSchool of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, ChinaSchool of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China; Corresponding author.School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, ChinaSchool of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, ChinaKey Laboratory of High Performance Manufacturing for Aero Engine, Ministry of Industry and Information Technology, School of Mechanical Engineering, Northwestern Polytechnical University, Xi'an, 710072, Shannxi, ChinaMinimizing the deviation of single-crystal (SX) primary orientation can significantly enhance the yield rate, service life, and performance of turbine blades or castings. Substrate stimulating method controls the deviation of <001> orientation within a narrower range by inducing nucleation of specific crystalline planes. In this study, during heterogeneous substrate stimulating growth for DD5 superalloy, the mechanism by which lattice misfit influences the orientation of new crystals were systematically elucidated. The study variables include substrate materials ((001) SX DD5, polycrystal DD5, and polycrystal Cu), orientations ((001), (101), (111)), cooling rates, and temperature. The target oriented grains were increased when the lattice misfit between the substrates of varying materials or orientations and new crystal were minimized. The melt undercooling decreases as the substrate cooling rate decreases, which can only stimulate the nucleation of crystalline planes with lower energy barriers (characterized by minimal lattice misfit). The thermal gradient in the melt decreases and the lattice misfit simultaneously decreases as the substrate temperature increases, these two factors jointly contribute to stimulating grains with lower lattice misfit. The substrate temperature leads to more pronounced variation in the proportion of target grains, than does the substrate cooling rate.http://www.sciencedirect.com/science/article/pii/S2238785424027261Heterogeneous nucleationSubstrate stimulatingLattice misfitNickel-based superalloy |
| spellingShingle | Binqiang Wang Senhong Chen Long Zeng Mingxu Xia Jianguo Li Kun Bu Mechanism of heterogeneous substrate stimulating growth for nickel-based single crystal superalloy Journal of Materials Research and Technology Heterogeneous nucleation Substrate stimulating Lattice misfit Nickel-based superalloy |
| title | Mechanism of heterogeneous substrate stimulating growth for nickel-based single crystal superalloy |
| title_full | Mechanism of heterogeneous substrate stimulating growth for nickel-based single crystal superalloy |
| title_fullStr | Mechanism of heterogeneous substrate stimulating growth for nickel-based single crystal superalloy |
| title_full_unstemmed | Mechanism of heterogeneous substrate stimulating growth for nickel-based single crystal superalloy |
| title_short | Mechanism of heterogeneous substrate stimulating growth for nickel-based single crystal superalloy |
| title_sort | mechanism of heterogeneous substrate stimulating growth for nickel based single crystal superalloy |
| topic | Heterogeneous nucleation Substrate stimulating Lattice misfit Nickel-based superalloy |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424027261 |
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