High-cycle fatigue behaviour and crack growth mechanism of Ni-base single crystal superalloy under intermediate temperature
This study investigates the high cycle fatigue behaviour of a Ni-base single crystal superalloy under 760 °C and 850 °C. At 760 °C, the crack initially grows in the crystallographic shearing mode and the crack tip propagation mechanism is non-crystallographic mode. Furthermore, near the crack tip pr...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-07-01
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| Series: | Journal of Materials Research and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785423014667 |
| _version_ | 1797745194978770944 |
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| author | Quanfeng Xiao Yuanming Xu Xinling Liu Xinghui Jia |
| author_facet | Quanfeng Xiao Yuanming Xu Xinling Liu Xinghui Jia |
| author_sort | Quanfeng Xiao |
| collection | DOAJ |
| description | This study investigates the high cycle fatigue behaviour of a Ni-base single crystal superalloy under 760 °C and 850 °C. At 760 °C, the crack initially grows in the crystallographic shearing mode and the crack tip propagation mechanism is non-crystallographic mode. Furthermore, near the crack tip propagated at 760 °C, the oxide film distributes along the γ/γʹ interface and the Ni-rich γʹ phase dissolution channels pass through the matrix in different ways, resulting in the wavy-like and dendritic cracks. When the temperature rises to 850 °C, recrystallization grains are observed in the fatigue initiation region. Moreover, the stress reduction leads to the increment of accumulative strain and the aggravation of the recrystallization. This will enhance the crack growth driving factor, promoting the crack to grow in crystallographic shearing mode. Finally, the mechanisms of high cycle fatigue crack growth influenced by temperatures and stresses are obtained and enhancement conditions of crack growth driving factor are revealed. |
| first_indexed | 2024-03-12T15:19:54Z |
| format | Article |
| id | doaj.art-6c8efc09c1584031aa8399a3327958f7 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-03-12T15:19:54Z |
| publishDate | 2023-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-6c8efc09c1584031aa8399a3327958f72023-08-11T05:33:57ZengElsevierJournal of Materials Research and Technology2238-78542023-07-012540364049High-cycle fatigue behaviour and crack growth mechanism of Ni-base single crystal superalloy under intermediate temperatureQuanfeng Xiao0Yuanming Xu1Xinling Liu2Xinghui Jia3School of Aeronautic Science and Engineering, Beihang University, Beijing 100191, China; Beijing Institute of Aeronautical Materials, Beijing 100095, ChinaSchool of Aeronautic Science and Engineering, Beihang University, Beijing 100191, China; Beijing Advanced Discipline Center for Unmanned Aircraft System, Beijing 100191, China; Corresponding author. School of Aeronautic Science and Engineering, Beihang University, Beijing 100191, China.Beijing Institute of Aeronautical Materials, Beijing 100095, ChinaState-run Changhong Machinery Factory, Guangxi 541002, ChinaThis study investigates the high cycle fatigue behaviour of a Ni-base single crystal superalloy under 760 °C and 850 °C. At 760 °C, the crack initially grows in the crystallographic shearing mode and the crack tip propagation mechanism is non-crystallographic mode. Furthermore, near the crack tip propagated at 760 °C, the oxide film distributes along the γ/γʹ interface and the Ni-rich γʹ phase dissolution channels pass through the matrix in different ways, resulting in the wavy-like and dendritic cracks. When the temperature rises to 850 °C, recrystallization grains are observed in the fatigue initiation region. Moreover, the stress reduction leads to the increment of accumulative strain and the aggravation of the recrystallization. This will enhance the crack growth driving factor, promoting the crack to grow in crystallographic shearing mode. Finally, the mechanisms of high cycle fatigue crack growth influenced by temperatures and stresses are obtained and enhancement conditions of crack growth driving factor are revealed.http://www.sciencedirect.com/science/article/pii/S2238785423014667Ni-base single crystal superalloyHigh cycle fatigueCrack growth modeγʹ phase dissolution channel |
| spellingShingle | Quanfeng Xiao Yuanming Xu Xinling Liu Xinghui Jia High-cycle fatigue behaviour and crack growth mechanism of Ni-base single crystal superalloy under intermediate temperature Journal of Materials Research and Technology Ni-base single crystal superalloy High cycle fatigue Crack growth mode γʹ phase dissolution channel |
| title | High-cycle fatigue behaviour and crack growth mechanism of Ni-base single crystal superalloy under intermediate temperature |
| title_full | High-cycle fatigue behaviour and crack growth mechanism of Ni-base single crystal superalloy under intermediate temperature |
| title_fullStr | High-cycle fatigue behaviour and crack growth mechanism of Ni-base single crystal superalloy under intermediate temperature |
| title_full_unstemmed | High-cycle fatigue behaviour and crack growth mechanism of Ni-base single crystal superalloy under intermediate temperature |
| title_short | High-cycle fatigue behaviour and crack growth mechanism of Ni-base single crystal superalloy under intermediate temperature |
| title_sort | high cycle fatigue behaviour and crack growth mechanism of ni base single crystal superalloy under intermediate temperature |
| topic | Ni-base single crystal superalloy High cycle fatigue Crack growth mode γʹ phase dissolution channel |
| url | http://www.sciencedirect.com/science/article/pii/S2238785423014667 |
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