The effects of DS blade׳s geometry features on material׳s creep strength
Because of the better creep performance, the directional solidification (DS) Nickel-based turbine blades have been widely used in advanced aero-engines. However, the DS turbine blade׳s different abrupt geometrical changes at different regions cause a variation of temperature field at those regions....
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2014-09-01
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| Series: | Propulsion and Power Research |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2212540X1400056X |
| _version_ | 1797712142817820672 |
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| author | Xiaojun Yan Kai Zhang Ying Deng Ruijie Sun Lianshan Lin Xiaoyong Zhang |
| author_facet | Xiaojun Yan Kai Zhang Ying Deng Ruijie Sun Lianshan Lin Xiaoyong Zhang |
| author_sort | Xiaojun Yan |
| collection | DOAJ |
| description | Because of the better creep performance, the directional solidification (DS) Nickel-based turbine blades have been widely used in advanced aero-engines. However, the DS turbine blade׳s different abrupt geometrical changes at different regions cause a variation of temperature field at those regions. Subsequently, the variable temperature field is very likely to lead to a different grain structures at those different region, and those different grain structure finally give rise to a variation in material׳s creep performance at different region in DS turbine blade. To study the variation in creep strength among different regions of a DS turbine blade, this article designed and manufactured three types of DS specimens to simulate the geometry features of platform, shroud and body part of a typical DS turbine blade. Creep tests on these specimens were conducted under the stress level of 608 MPa and temperature of 850 °C, the creep rupture life of platform-like and shroud-like specimens are 93% and 73% of body-like specimens׳ respectively, which support the assumption that there exists a certain variation in material׳s creep strength among different regions in DS turbine blades. The fracture positions of these specimens also support above conclusion. It is suggested that the material׳s creep strength variation among different locations of DS turbine blades should be considered in future turbine blade life design and prediction. |
| first_indexed | 2024-03-12T07:17:24Z |
| format | Article |
| id | doaj.art-a81cd97aa8c847f491e6c7f97f83d298 |
| institution | Directory Open Access Journal |
| issn | 2212-540X |
| language | English |
| last_indexed | 2024-03-12T07:17:24Z |
| publishDate | 2014-09-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Propulsion and Power Research |
| spelling | doaj.art-a81cd97aa8c847f491e6c7f97f83d2982023-09-02T22:43:11ZengKeAi Communications Co., Ltd.Propulsion and Power Research2212-540X2014-09-013314315010.1016/j.jppr.2014.07.004The effects of DS blade׳s geometry features on material׳s creep strengthXiaojun Yan0Kai Zhang1Ying Deng2Ruijie Sun3Lianshan Lin4Xiaoyong Zhang5School of Energy and Power Engineering, Beihang University, Beijing 100191, ChinaSchool of Energy and Power Engineering, Beihang University, Beijing 100191, ChinaSchool of Energy and Power Engineering, Beihang University, Beijing 100191, ChinaSchool of Energy and Power Engineering, Beihang University, Beijing 100191, ChinaOak Ridge National Laboratory, Oak Ridge, TN 37831, United StatesSchool of Energy and Power Engineering, Beihang University, Beijing 100191, ChinaBecause of the better creep performance, the directional solidification (DS) Nickel-based turbine blades have been widely used in advanced aero-engines. However, the DS turbine blade׳s different abrupt geometrical changes at different regions cause a variation of temperature field at those regions. Subsequently, the variable temperature field is very likely to lead to a different grain structures at those different region, and those different grain structure finally give rise to a variation in material׳s creep performance at different region in DS turbine blade. To study the variation in creep strength among different regions of a DS turbine blade, this article designed and manufactured three types of DS specimens to simulate the geometry features of platform, shroud and body part of a typical DS turbine blade. Creep tests on these specimens were conducted under the stress level of 608 MPa and temperature of 850 °C, the creep rupture life of platform-like and shroud-like specimens are 93% and 73% of body-like specimens׳ respectively, which support the assumption that there exists a certain variation in material׳s creep strength among different regions in DS turbine blades. The fracture positions of these specimens also support above conclusion. It is suggested that the material׳s creep strength variation among different locations of DS turbine blades should be considered in future turbine blade life design and prediction.http://www.sciencedirect.com/science/article/pii/S2212540X1400056XCreep strengthDirectional solidificationTurbine bladeGrain structureGeometry features |
| spellingShingle | Xiaojun Yan Kai Zhang Ying Deng Ruijie Sun Lianshan Lin Xiaoyong Zhang The effects of DS blade׳s geometry features on material׳s creep strength Propulsion and Power Research Creep strength Directional solidification Turbine blade Grain structure Geometry features |
| title | The effects of DS blade׳s geometry features on material׳s creep strength |
| title_full | The effects of DS blade׳s geometry features on material׳s creep strength |
| title_fullStr | The effects of DS blade׳s geometry features on material׳s creep strength |
| title_full_unstemmed | The effects of DS blade׳s geometry features on material׳s creep strength |
| title_short | The effects of DS blade׳s geometry features on material׳s creep strength |
| title_sort | effects of ds blade׳s geometry features on material׳s creep strength |
| topic | Creep strength Directional solidification Turbine blade Grain structure Geometry features |
| url | http://www.sciencedirect.com/science/article/pii/S2212540X1400056X |
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