Multi-scale influences of as-cast microstructure heritability on intermediate/high temperature stress rupture behaviors of [111]-oriented Ni-based single crystal superalloy
This study challenges the generally accepted principle that some degree of as-cast microstructure heritability (CMH), marked by <001> -oriented dendrite-associated inhomogeneity, is tolerable in conventional [001]-oriented Ni-based single crystal (SX) superalloys. Our findings reveal that this...
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Elsevier
2024-11-01
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| Series: | Materials & Design |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0264127524008001 |
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| author | Lei Xu Junwu Wang Yuanhang Gao Yi Ru Wenyue Zhao Jinghui Jia Bin Gan Shan Li Yanling Pei Shusuo Li Yue Ma Shengkai Gong |
| author_facet | Lei Xu Junwu Wang Yuanhang Gao Yi Ru Wenyue Zhao Jinghui Jia Bin Gan Shan Li Yanling Pei Shusuo Li Yue Ma Shengkai Gong |
| author_sort | Lei Xu |
| collection | DOAJ |
| description | This study challenges the generally accepted principle that some degree of as-cast microstructure heritability (CMH), marked by <001> -oriented dendrite-associated inhomogeneity, is tolerable in conventional [001]-oriented Ni-based single crystal (SX) superalloys. Our findings reveal that this principle does not hold for newly developed [111]-oriented SX superalloys, where <001> -directed dendrites experience significant resolved shear stress under [111] applied loads. This work examines the stress rupture behaviors of a [111]-oriented low-Re Ni-based SX superalloy under various CMH conditions at 1100 °C/160 MPa and 760 °C/800 MPa. In the absence of CMH, the alloy achieves rupture properties comparable to fourth-generation SX superalloys. However, the presence of CMH drastically shortens rupture life and alters multi-scale deformation behaviors. High-temperature damage involves submicroscopic dislocation shearing, microscopic crack initiation, mesoscopic inter-dendritic crack connections, and macroscopic fractures. Intermediate-temperature damage is marked by submicroscopic stacking fault shearing, microscopic shear zone deformation, mesoscopic crack propagation, and macroscopic lattice rotation. Moreover, this research investigates the degradation mechanism of stress rupture property when the CMH is combined with slow cooling and reveals unique deformation behaviors, such as high-temperature subgrain formation and intermediate-temperature isolated micro-twins. This work provides new insights into the influence mechanism of the CMH. |
| format | Article |
| id | doaj-art-3c34342274c54d1ca06de8feef33fb25 |
| institution | OA Journals |
| issn | 0264-1275 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials & Design |
| spelling | doaj-art-3c34342274c54d1ca06de8feef33fb252025-08-20T02:30:42ZengElsevierMaterials & Design0264-12752024-11-0124711342510.1016/j.matdes.2024.113425Multi-scale influences of as-cast microstructure heritability on intermediate/high temperature stress rupture behaviors of [111]-oriented Ni-based single crystal superalloyLei Xu0Junwu Wang1Yuanhang Gao2Yi Ru3Wenyue Zhao4Jinghui Jia5Bin Gan6Shan Li7Yanling Pei8Shusuo Li9Yue Ma10Shengkai Gong11School of Materials Science and Engineering, Beihang University, No. 37 Xueyuan Road, Beijing 100191, ChinaResearch Institute of Aero-Engine, Beihang University, Beijing 100191, ChinaSchool of Materials Science and Engineering, Beihang University, No. 37 Xueyuan Road, Beijing 100191, ChinaSchool of Materials Science and Engineering, Beihang University, No. 37 Xueyuan Road, Beijing 100191, China; Tianmushan Laboratory, Yuhang District, Hangzhou City, Zhejiang Province 311115, China; Suzhou Laboratory, No.388, Ruoshui Street, SIP, Jiangsu 215123, China; Corresponding authors.School of Materials Science and Engineering, Beihang University, No. 37 Xueyuan Road, Beijing 100191, ChinaGuiyang AECC Power Precision Casting Co., LTD, No. 170 Xixian Road, Guizhou, ChinaSuzhou Laboratory, No.388, Ruoshui Street, SIP, Jiangsu 215123, ChinaSuzhou Laboratory, No.388, Ruoshui Street, SIP, Jiangsu 215123, ChinaSchool of Materials Science and Engineering, Beihang University, No. 37 Xueyuan Road, Beijing 100191, ChinaSchool of Materials Science and Engineering, Beihang University, No. 37 Xueyuan Road, Beijing 100191, ChinaSchool of Materials Science and Engineering, Beihang University, No. 37 Xueyuan Road, Beijing 100191, China; Corresponding authors.School of Materials Science and Engineering, Beihang University, No. 37 Xueyuan Road, Beijing 100191, ChinaThis study challenges the generally accepted principle that some degree of as-cast microstructure heritability (CMH), marked by <001> -oriented dendrite-associated inhomogeneity, is tolerable in conventional [001]-oriented Ni-based single crystal (SX) superalloys. Our findings reveal that this principle does not hold for newly developed [111]-oriented SX superalloys, where <001> -directed dendrites experience significant resolved shear stress under [111] applied loads. This work examines the stress rupture behaviors of a [111]-oriented low-Re Ni-based SX superalloy under various CMH conditions at 1100 °C/160 MPa and 760 °C/800 MPa. In the absence of CMH, the alloy achieves rupture properties comparable to fourth-generation SX superalloys. However, the presence of CMH drastically shortens rupture life and alters multi-scale deformation behaviors. High-temperature damage involves submicroscopic dislocation shearing, microscopic crack initiation, mesoscopic inter-dendritic crack connections, and macroscopic fractures. Intermediate-temperature damage is marked by submicroscopic stacking fault shearing, microscopic shear zone deformation, mesoscopic crack propagation, and macroscopic lattice rotation. Moreover, this research investigates the degradation mechanism of stress rupture property when the CMH is combined with slow cooling and reveals unique deformation behaviors, such as high-temperature subgrain formation and intermediate-temperature isolated micro-twins. This work provides new insights into the influence mechanism of the CMH.http://www.sciencedirect.com/science/article/pii/S0264127524008001As-cast microstructure heritability (CMH)Stress rupture propertyDeformation behaviorFracture modeMulti-scale influence |
| spellingShingle | Lei Xu Junwu Wang Yuanhang Gao Yi Ru Wenyue Zhao Jinghui Jia Bin Gan Shan Li Yanling Pei Shusuo Li Yue Ma Shengkai Gong Multi-scale influences of as-cast microstructure heritability on intermediate/high temperature stress rupture behaviors of [111]-oriented Ni-based single crystal superalloy Materials & Design As-cast microstructure heritability (CMH) Stress rupture property Deformation behavior Fracture mode Multi-scale influence |
| title | Multi-scale influences of as-cast microstructure heritability on intermediate/high temperature stress rupture behaviors of [111]-oriented Ni-based single crystal superalloy |
| title_full | Multi-scale influences of as-cast microstructure heritability on intermediate/high temperature stress rupture behaviors of [111]-oriented Ni-based single crystal superalloy |
| title_fullStr | Multi-scale influences of as-cast microstructure heritability on intermediate/high temperature stress rupture behaviors of [111]-oriented Ni-based single crystal superalloy |
| title_full_unstemmed | Multi-scale influences of as-cast microstructure heritability on intermediate/high temperature stress rupture behaviors of [111]-oriented Ni-based single crystal superalloy |
| title_short | Multi-scale influences of as-cast microstructure heritability on intermediate/high temperature stress rupture behaviors of [111]-oriented Ni-based single crystal superalloy |
| title_sort | multi scale influences of as cast microstructure heritability on intermediate high temperature stress rupture behaviors of 111 oriented ni based single crystal superalloy |
| topic | As-cast microstructure heritability (CMH) Stress rupture property Deformation behavior Fracture mode Multi-scale influence |
| url | http://www.sciencedirect.com/science/article/pii/S0264127524008001 |
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