Effect of Construction Manner of Mould Cluster on Stray Grain Formation in Dummy Blade of DD6 Superalloy
A dummy blade of Ni-based single crystal (SX) superalloy was modelled to investigate the stray grain (SG) defect by both experiment and simulation. Three construction manners of mould cluster (CMMC) with 0°, 45° and 90° assembling angle were considered. The experimental results reveal a strong depen...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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De Gruyter
2017-04-01
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| Series: | High Temperature Materials and Processes |
| Subjects: | |
| Online Access: | https://doi.org/10.1515/htmp-2016-0138 |
| _version_ | 1819026858212065280 |
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| author | Wang Runnan Yan Xuewei Li Zhonglin Xu Qingyan Liu Baicheng |
| author_facet | Wang Runnan Yan Xuewei Li Zhonglin Xu Qingyan Liu Baicheng |
| author_sort | Wang Runnan |
| collection | DOAJ |
| description | A dummy blade of Ni-based single crystal (SX) superalloy was modelled to investigate the stray grain (SG) defect by both experiment and simulation. Three construction manners of mould cluster (CMMC) with 0°, 45° and 90° assembling angle were considered. The experimental results reveal a strong dependence of SG sensitivity upon CMMC. Profuse SGs took place in the case of 0°, but almost no one shown in those of 45° and 90°. The FEM simulation results indicate that SG occurrence is not only determined by critical nucleation undercooling, but also the geometrical characteristic, shape of liquidus isotherm and other three important effects (shadow effect, channel effect and dimension effect). The tendency of SG formation increases with the increase of number of these effects. By means of the combination effect consisting of the above three effects, SG occurrence can be qualitatively predicted and process window is more accurately modified. |
| first_indexed | 2024-12-21T05:33:15Z |
| format | Article |
| id | doaj.art-c1f62370175c4db394f5551e8f3aea14 |
| institution | Directory Open Access Journal |
| issn | 0334-6455 2191-0324 |
| language | English |
| last_indexed | 2024-12-21T05:33:15Z |
| publishDate | 2017-04-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | High Temperature Materials and Processes |
| spelling | doaj.art-c1f62370175c4db394f5551e8f3aea142022-12-21T19:14:29ZengDe GruyterHigh Temperature Materials and Processes0334-64552191-03242017-04-0136439940910.1515/htmp-2016-0138Effect of Construction Manner of Mould Cluster on Stray Grain Formation in Dummy Blade of DD6 SuperalloyWang Runnan0Yan Xuewei1Li Zhonglin2Xu Qingyan3Liu Baicheng4Key Laboratory for Advanced Materials Processing Technology, Ministry of Education, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, ChinaKey Laboratory for Advanced Materials Processing Technology, Ministry of Education, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, ChinaKey Laboratory for Advanced Materials Processing Technology, Ministry of Education, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, ChinaKey Laboratory for Advanced Materials Processing Technology, Ministry of Education, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, ChinaKey Laboratory for Advanced Materials Processing Technology, Ministry of Education, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, ChinaA dummy blade of Ni-based single crystal (SX) superalloy was modelled to investigate the stray grain (SG) defect by both experiment and simulation. Three construction manners of mould cluster (CMMC) with 0°, 45° and 90° assembling angle were considered. The experimental results reveal a strong dependence of SG sensitivity upon CMMC. Profuse SGs took place in the case of 0°, but almost no one shown in those of 45° and 90°. The FEM simulation results indicate that SG occurrence is not only determined by critical nucleation undercooling, but also the geometrical characteristic, shape of liquidus isotherm and other three important effects (shadow effect, channel effect and dimension effect). The tendency of SG formation increases with the increase of number of these effects. By means of the combination effect consisting of the above three effects, SG occurrence can be qualitatively predicted and process window is more accurately modified.https://doi.org/10.1515/htmp-2016-0138single crystalstray grainsnumerical simulationcombination effectsprocess window |
| spellingShingle | Wang Runnan Yan Xuewei Li Zhonglin Xu Qingyan Liu Baicheng Effect of Construction Manner of Mould Cluster on Stray Grain Formation in Dummy Blade of DD6 Superalloy High Temperature Materials and Processes single crystal stray grains numerical simulation combination effects process window |
| title | Effect of Construction Manner of Mould Cluster on Stray Grain Formation in Dummy Blade of DD6 Superalloy |
| title_full | Effect of Construction Manner of Mould Cluster on Stray Grain Formation in Dummy Blade of DD6 Superalloy |
| title_fullStr | Effect of Construction Manner of Mould Cluster on Stray Grain Formation in Dummy Blade of DD6 Superalloy |
| title_full_unstemmed | Effect of Construction Manner of Mould Cluster on Stray Grain Formation in Dummy Blade of DD6 Superalloy |
| title_short | Effect of Construction Manner of Mould Cluster on Stray Grain Formation in Dummy Blade of DD6 Superalloy |
| title_sort | effect of construction manner of mould cluster on stray grain formation in dummy blade of dd6 superalloy |
| topic | single crystal stray grains numerical simulation combination effects process window |
| url | https://doi.org/10.1515/htmp-2016-0138 |
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