Designing model for adaptive variable withdrawal rate strategies to control misaligned grains during directional solidification of large-sized complex-shaped turbine blades
Misaligned grains present significant challenges in the directional solidification of complex-shaped industrial gas turbine (IGTs) blades made from Ni-based superalloys using the Bridgman method. These defects are closely associated with the bending of the solid/liquid (S/L) interface isotherm, a ph...
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| Format: | Article |
| Language: | English |
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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/S2238785424029132 |
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| author | Yang Liu Fu Wang Jing Wang Qiang Yang Dichen Li Jiantao Wu |
| author_facet | Yang Liu Fu Wang Jing Wang Qiang Yang Dichen Li Jiantao Wu |
| author_sort | Yang Liu |
| collection | DOAJ |
| description | Misaligned grains present significant challenges in the directional solidification of complex-shaped industrial gas turbine (IGTs) blades made from Ni-based superalloys using the Bridgman method. These defects are closely associated with the bending of the solid/liquid (S/L) interface isotherm, a phenomenon heavily influenced by its relative position to the insulation baffle during solidification. The location of this isotherm is determined by the withdrawal rate employed. This study develops a simplified mathematical model that integrates blade and mold geometries, processing parameters affecting heat transfer, and the morphology of the liquidus isotherm. The model aims to design adaptive strategies for varying the withdrawal rate to control misaligned grain formation during directional solidification. By leveraging this theoretical framework, optimal adaptive withdrawal rate strategies were automatically generated, effectively flattening the liquidus isotherm and controlling misaligned grain formation in both dummy and actual IGT blades. This model, tailored to automatically design adaptive withdrawal rate routes, offers a robust strategy for producing misaligned-grain-free IGT blades. |
| format | Article |
| id | doaj-art-027181058a79408583011f0c06551b7d |
| 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-027181058a79408583011f0c06551b7d2025-01-19T06:25:29ZengElsevierJournal of Materials Research and Technology2238-78542025-01-0134832844Designing model for adaptive variable withdrawal rate strategies to control misaligned grains during directional solidification of large-sized complex-shaped turbine bladesYang Liu0Fu Wang1Jing Wang2Qiang Yang3Dichen Li4Jiantao Wu5State Key Laboratory for Manufacturing System Engineering, School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, ChinaState Key Laboratory for Manufacturing System Engineering, School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China; Corresponding author.State Key Laboratory for Manufacturing System Engineering, School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, ChinaState Key Laboratory for Manufacturing System Engineering, School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, ChinaState Key Laboratory for Manufacturing System Engineering, School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, ChinaCentral Iron & Steel Research Institute, Beijing 100081, ChinaMisaligned grains present significant challenges in the directional solidification of complex-shaped industrial gas turbine (IGTs) blades made from Ni-based superalloys using the Bridgman method. These defects are closely associated with the bending of the solid/liquid (S/L) interface isotherm, a phenomenon heavily influenced by its relative position to the insulation baffle during solidification. The location of this isotherm is determined by the withdrawal rate employed. This study develops a simplified mathematical model that integrates blade and mold geometries, processing parameters affecting heat transfer, and the morphology of the liquidus isotherm. The model aims to design adaptive strategies for varying the withdrawal rate to control misaligned grain formation during directional solidification. By leveraging this theoretical framework, optimal adaptive withdrawal rate strategies were automatically generated, effectively flattening the liquidus isotherm and controlling misaligned grain formation in both dummy and actual IGT blades. This model, tailored to automatically design adaptive withdrawal rate routes, offers a robust strategy for producing misaligned-grain-free IGT blades.http://www.sciencedirect.com/science/article/pii/S2238785424029132Ni-based superalloysDirectional solidificationMisaligned grainsAdaptive variable withdrawal rateTurbine blades |
| spellingShingle | Yang Liu Fu Wang Jing Wang Qiang Yang Dichen Li Jiantao Wu Designing model for adaptive variable withdrawal rate strategies to control misaligned grains during directional solidification of large-sized complex-shaped turbine blades Journal of Materials Research and Technology Ni-based superalloys Directional solidification Misaligned grains Adaptive variable withdrawal rate Turbine blades |
| title | Designing model for adaptive variable withdrawal rate strategies to control misaligned grains during directional solidification of large-sized complex-shaped turbine blades |
| title_full | Designing model for adaptive variable withdrawal rate strategies to control misaligned grains during directional solidification of large-sized complex-shaped turbine blades |
| title_fullStr | Designing model for adaptive variable withdrawal rate strategies to control misaligned grains during directional solidification of large-sized complex-shaped turbine blades |
| title_full_unstemmed | Designing model for adaptive variable withdrawal rate strategies to control misaligned grains during directional solidification of large-sized complex-shaped turbine blades |
| title_short | Designing model for adaptive variable withdrawal rate strategies to control misaligned grains during directional solidification of large-sized complex-shaped turbine blades |
| title_sort | designing model for adaptive variable withdrawal rate strategies to control misaligned grains during directional solidification of large sized complex shaped turbine blades |
| topic | Ni-based superalloys Directional solidification Misaligned grains Adaptive variable withdrawal rate Turbine blades |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424029132 |
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