Vibration Fatigue Properties and Fracture Mechanism of DD6 Single Crystal Superalloy
Room Temperature vibration fatigue <i>S-N</i> curves of single crystal superalloy DD6 with[001] orientation was investigated and room temperature vibration fatigue limit was obtained. The fracture mechanism was studied by OM, SEM and EBSD. The results show that based on <i>S-N</...
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| Format: | Article |
| Language: | zho |
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Journal of Materials Engineering
2018-02-01
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| Series: | Cailiao gongcheng |
| Subjects: | |
| Online Access: | http://jme.biam.ac.cn/CN/Y2018/V46/I2/128 |
| _version_ | 1797966281699229696 |
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| author | LIU Li-yu GAO Xiang-yu YANG Xian-feng HE Yu-huai |
| author_facet | LIU Li-yu GAO Xiang-yu YANG Xian-feng HE Yu-huai |
| author_sort | LIU Li-yu |
| collection | DOAJ |
| description | Room Temperature vibration fatigue <i>S-N</i> curves of single crystal superalloy DD6 with[001] orientation was investigated and room temperature vibration fatigue limit was obtained. The fracture mechanism was studied by OM, SEM and EBSD. The results show that based on <i>S-N</i> method, vibration fatigue limit of DD6 single crystal superalloy with[001] orientation is estimated to be around 337.5MPa. Vibration fatigue fracture presents single or several {111} octahedral slip planes. SEM observations show that fracture has two regions:fatigue source region and the fatigue crack propagation regions, the fatigue cracks initiate at the surface or internal defect of the cross-section with the maximum stress, and exhibits a single source feature, fatigue crack propagation region exhibits quasi-cleavage fracture, no typical fatigue striation feature. Crystal plane slip along {111} is the main deformation mechanism of RT vibration fatigue fracture of single crystal superalloy DD6, quasi-cleavage propagation plane in fracture and quasi-cleavage patterns in microstructure are the main features of RT vibration fatigue fracture of single crystal superalloy DD6. |
| first_indexed | 2024-04-11T02:13:15Z |
| format | Article |
| id | doaj.art-b9ed3a4b81e9400bb0db7021cedf93c2 |
| institution | Directory Open Access Journal |
| issn | 1001-4381 1001-4381 |
| language | zho |
| last_indexed | 2024-04-11T02:13:15Z |
| publishDate | 2018-02-01 |
| publisher | Journal of Materials Engineering |
| record_format | Article |
| series | Cailiao gongcheng |
| spelling | doaj.art-b9ed3a4b81e9400bb0db7021cedf93c22023-01-03T01:48:58ZzhoJournal of Materials EngineeringCailiao gongcheng1001-43811001-43812018-02-0146212813310.11868/j.issn.1001-4381.2016.000891201802000891Vibration Fatigue Properties and Fracture Mechanism of DD6 Single Crystal SuperalloyLIU Li-yu0GAO Xiang-yu1YANG Xian-feng2HE Yu-huai3AECC Beijing Institute of Aeronautical Materials, Beijing 100095, ChinaAECC Beijing Institute of Aeronautical Materials, Beijing 100095, ChinaAECC Beijing Institute of Aeronautical Materials, Beijing 100095, ChinaAECC Beijing Institute of Aeronautical Materials, Beijing 100095, ChinaRoom Temperature vibration fatigue <i>S-N</i> curves of single crystal superalloy DD6 with[001] orientation was investigated and room temperature vibration fatigue limit was obtained. The fracture mechanism was studied by OM, SEM and EBSD. The results show that based on <i>S-N</i> method, vibration fatigue limit of DD6 single crystal superalloy with[001] orientation is estimated to be around 337.5MPa. Vibration fatigue fracture presents single or several {111} octahedral slip planes. SEM observations show that fracture has two regions:fatigue source region and the fatigue crack propagation regions, the fatigue cracks initiate at the surface or internal defect of the cross-section with the maximum stress, and exhibits a single source feature, fatigue crack propagation region exhibits quasi-cleavage fracture, no typical fatigue striation feature. Crystal plane slip along {111} is the main deformation mechanism of RT vibration fatigue fracture of single crystal superalloy DD6, quasi-cleavage propagation plane in fracture and quasi-cleavage patterns in microstructure are the main features of RT vibration fatigue fracture of single crystal superalloy DD6.http://jme.biam.ac.cn/CN/Y2018/V46/I2/128DD6 single crystal superalloyvibration fatiguefracture mechanismquasi-cleavage plane |
| spellingShingle | LIU Li-yu GAO Xiang-yu YANG Xian-feng HE Yu-huai Vibration Fatigue Properties and Fracture Mechanism of DD6 Single Crystal Superalloy Cailiao gongcheng DD6 single crystal superalloy vibration fatigue fracture mechanism quasi-cleavage plane |
| title | Vibration Fatigue Properties and Fracture Mechanism of DD6 Single Crystal Superalloy |
| title_full | Vibration Fatigue Properties and Fracture Mechanism of DD6 Single Crystal Superalloy |
| title_fullStr | Vibration Fatigue Properties and Fracture Mechanism of DD6 Single Crystal Superalloy |
| title_full_unstemmed | Vibration Fatigue Properties and Fracture Mechanism of DD6 Single Crystal Superalloy |
| title_short | Vibration Fatigue Properties and Fracture Mechanism of DD6 Single Crystal Superalloy |
| title_sort | vibration fatigue properties and fracture mechanism of dd6 single crystal superalloy |
| topic | DD6 single crystal superalloy vibration fatigue fracture mechanism quasi-cleavage plane |
| url | http://jme.biam.ac.cn/CN/Y2018/V46/I2/128 |
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