Enhanced mechanical properties of a nickel-based superalloy by regulating laves and δ phases via hot rolling deformation
This article investigated the precipitation behaviors of laves phase and δ phase, and the mechanical properties of a nickel-based superalloy. The results show that the bulk laves phase surrounded by the acicular δ phase formed at the grain boundaries in the as-homogenization heat treated alloy. Afte...
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| Format: | Article |
| Language: | English |
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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/S2238785425011512 |
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| author | Jianhui Wei Yanghuanzi Li Changchang Liu Shengnan Ma Ji Gu Min Lu Min Song |
| author_facet | Jianhui Wei Yanghuanzi Li Changchang Liu Shengnan Ma Ji Gu Min Lu Min Song |
| author_sort | Jianhui Wei |
| collection | DOAJ |
| description | This article investigated the precipitation behaviors of laves phase and δ phase, and the mechanical properties of a nickel-based superalloy. The results show that the bulk laves phase surrounded by the acicular δ phase formed at the grain boundaries in the as-homogenization heat treated alloy. After 20 % rolling deformation at 550 °C, the laves phase re-dissolved and the δ phase bent, resulting in a simultaneous increase of 67.9 %, 27.4 % and 60.7 % in the yield strength (YS), ultimate tensile strength (UTS) and ductility of the alloy, respectively. A favorable combination of mechanical properties was achieved, with the YS being 576 MPa, the UTS being 689 MPa and the elongation being 28.6 %. When 40 % rolling deformation was carried out at 750 °C, the YS and UTS of increase significantly to 1194 MPa and 1240 MPa, and an acceptable elongation of 8.3 % due to the fragmentation of the laves phase and the fracture of the δ phase. The relationship between the microstructural evolution and the mechanical properties of the alloy was discussed. These findings offer valuable insights into the microstructural control of the laves phase and δ phase in nickel-based superalloys, providing an effective strategy for optimizing the mechanical performance. |
| format | Article |
| id | doaj-art-4423684ece3a4b4c9215d034199c2e22 |
| 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-4423684ece3a4b4c9215d034199c2e222025-08-20T02:27:15ZengElsevierJournal of Materials Research and Technology2238-78542025-05-01367344735010.1016/j.jmrt.2025.04.330Enhanced mechanical properties of a nickel-based superalloy by regulating laves and δ phases via hot rolling deformationJianhui Wei0Yanghuanzi Li1Changchang Liu2Shengnan Ma3Ji Gu4Min Lu5Min Song6State Key Laboratory of Powder Metallurgy, Central South University, Changsha, 410083, China; Shenzhen Wanze Aviation Technology Co., Ltd., Shenzhen, 518033, ChinaState Key Laboratory of Powder Metallurgy, Central South University, Changsha, 410083, ChinaState Key Laboratory of Powder Metallurgy, Central South University, Changsha, 410083, ChinaState Key Laboratory of Powder Metallurgy, Central South University, Changsha, 410083, ChinaState Key Laboratory of Powder Metallurgy, Central South University, Changsha, 410083, China; Corresponding author.State Key Laboratory of Powder Metallurgy, Central South University, Changsha, 410083, China; Shanghai Wanze Precision Casting Co., Ltd., Shanghai, 201400, ChinaState Key Laboratory of Powder Metallurgy, Central South University, Changsha, 410083, ChinaThis article investigated the precipitation behaviors of laves phase and δ phase, and the mechanical properties of a nickel-based superalloy. The results show that the bulk laves phase surrounded by the acicular δ phase formed at the grain boundaries in the as-homogenization heat treated alloy. After 20 % rolling deformation at 550 °C, the laves phase re-dissolved and the δ phase bent, resulting in a simultaneous increase of 67.9 %, 27.4 % and 60.7 % in the yield strength (YS), ultimate tensile strength (UTS) and ductility of the alloy, respectively. A favorable combination of mechanical properties was achieved, with the YS being 576 MPa, the UTS being 689 MPa and the elongation being 28.6 %. When 40 % rolling deformation was carried out at 750 °C, the YS and UTS of increase significantly to 1194 MPa and 1240 MPa, and an acceptable elongation of 8.3 % due to the fragmentation of the laves phase and the fracture of the δ phase. The relationship between the microstructural evolution and the mechanical properties of the alloy was discussed. These findings offer valuable insights into the microstructural control of the laves phase and δ phase in nickel-based superalloys, providing an effective strategy for optimizing the mechanical performance.http://www.sciencedirect.com/science/article/pii/S2238785425011512SuperalloysLaves phaseδ phaseHot deformationMechanical properties |
| spellingShingle | Jianhui Wei Yanghuanzi Li Changchang Liu Shengnan Ma Ji Gu Min Lu Min Song Enhanced mechanical properties of a nickel-based superalloy by regulating laves and δ phases via hot rolling deformation Journal of Materials Research and Technology Superalloys Laves phase δ phase Hot deformation Mechanical properties |
| title | Enhanced mechanical properties of a nickel-based superalloy by regulating laves and δ phases via hot rolling deformation |
| title_full | Enhanced mechanical properties of a nickel-based superalloy by regulating laves and δ phases via hot rolling deformation |
| title_fullStr | Enhanced mechanical properties of a nickel-based superalloy by regulating laves and δ phases via hot rolling deformation |
| title_full_unstemmed | Enhanced mechanical properties of a nickel-based superalloy by regulating laves and δ phases via hot rolling deformation |
| title_short | Enhanced mechanical properties of a nickel-based superalloy by regulating laves and δ phases via hot rolling deformation |
| title_sort | enhanced mechanical properties of a nickel based superalloy by regulating laves and δ phases via hot rolling deformation |
| topic | Superalloys Laves phase δ phase Hot deformation Mechanical properties |
| url | http://www.sciencedirect.com/science/article/pii/S2238785425011512 |
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