Effect of process parameters on microstructure and properties of superalloy turbine guide castings by a novel electromagnetic oscillation method
The difficulty in grain refinement during the casting of superalloy turbine guides is the primary factor of their low percent of pass. This study innovatively employs the electromagnetic oscillation (EMO) process during pouring and solidification using self-developed device to break through this pro...
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| Language: | English |
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Elsevier
2024-11-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S223878542402492X |
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| author | Zong-sheng Xie Xin Hao Guo-huai Liu Hang Zheng Chi Zhang Chu-shan Yi Zhao-dong Wang |
| author_facet | Zong-sheng Xie Xin Hao Guo-huai Liu Hang Zheng Chi Zhang Chu-shan Yi Zhao-dong Wang |
| author_sort | Zong-sheng Xie |
| collection | DOAJ |
| description | The difficulty in grain refinement during the casting of superalloy turbine guides is the primary factor of their low percent of pass. This study innovatively employs the electromagnetic oscillation (EMO) process during pouring and solidification using self-developed device to break through this problem. The effect of various process parameters on blade microstructure is also investigated. The result shows that implementing 300 A/20 Hz optimal EMO process produces uniformly fine equiaxed grains, reducing average grain sizes by 71.83% at the blade concave and 75.80% at the inlet edge. Yield and tensile strength increased by 22.34% and 27.15%, respectively, reaching a tensile strength of 1208.09 MPa. Elongation and section shrinkage also increased by 69.67% and 19.57%, respectively. The forced oscillation of melt caused by alternating magnetic field flushes and fragments dendrites, creating numerous nucleation sites, thus promoting grain refinement. The current intensity is linearly correlated with the electromagnetic force within the melt, influencing consequent oscillation effects. The optimal electromagnetic oscillation penetration depth, calculated at 42 mm, is determined by the number of oscillations and skin effect. This depth, calculated based on the inherent properties of the alloy, is instrumental in ascertaining the optimum current frequency for this model of turbine guides, applicable across different alloy compositions. The tensile deformation behavior of castings is altered by the grain refinement induced by the EMO process, enhancing tensile properties through the promotion of more homogeneous deformation and the inhibition effect of grain boundaries and one-dimensional defects on dislocations. |
| format | Article |
| id | doaj-art-40c714109c25419ca1be2b7f9e263ea4 |
| institution | DOAJ |
| issn | 2238-7854 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-40c714109c25419ca1be2b7f9e263ea42025-08-20T02:39:12ZengElsevierJournal of Materials Research and Technology2238-78542024-11-01335671568210.1016/j.jmrt.2024.10.222Effect of process parameters on microstructure and properties of superalloy turbine guide castings by a novel electromagnetic oscillation methodZong-sheng Xie0Xin Hao1Guo-huai Liu2Hang Zheng3Chi Zhang4Chu-shan Yi5Zhao-dong Wang6State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang, 110819, ChinaAECC South Industry Company Limited, Zhuzhou, 412002, ChinaState Key Laboratory of Rolling and Automation, Northeastern University, Shenyang, 110819, China; Corresponding author.AECC South Industry Company Limited, Zhuzhou, 412002, ChinaSchool of Materials Science & Engineering, Shenyang University of Technology, Shenyang, 110870, ChinaAECC South Industry Company Limited, Zhuzhou, 412002, ChinaInstitute of Materials, Henan Academy of Sciences, Zhengzhou, 450046, China; Corresponding author.The difficulty in grain refinement during the casting of superalloy turbine guides is the primary factor of their low percent of pass. This study innovatively employs the electromagnetic oscillation (EMO) process during pouring and solidification using self-developed device to break through this problem. The effect of various process parameters on blade microstructure is also investigated. The result shows that implementing 300 A/20 Hz optimal EMO process produces uniformly fine equiaxed grains, reducing average grain sizes by 71.83% at the blade concave and 75.80% at the inlet edge. Yield and tensile strength increased by 22.34% and 27.15%, respectively, reaching a tensile strength of 1208.09 MPa. Elongation and section shrinkage also increased by 69.67% and 19.57%, respectively. The forced oscillation of melt caused by alternating magnetic field flushes and fragments dendrites, creating numerous nucleation sites, thus promoting grain refinement. The current intensity is linearly correlated with the electromagnetic force within the melt, influencing consequent oscillation effects. The optimal electromagnetic oscillation penetration depth, calculated at 42 mm, is determined by the number of oscillations and skin effect. This depth, calculated based on the inherent properties of the alloy, is instrumental in ascertaining the optimum current frequency for this model of turbine guides, applicable across different alloy compositions. The tensile deformation behavior of castings is altered by the grain refinement induced by the EMO process, enhancing tensile properties through the promotion of more homogeneous deformation and the inhibition effect of grain boundaries and one-dimensional defects on dislocations.http://www.sciencedirect.com/science/article/pii/S223878542402492XSuperalloyTurbine guide bladeInvestment castingElectromagnetic oscillationGrain refinement |
| spellingShingle | Zong-sheng Xie Xin Hao Guo-huai Liu Hang Zheng Chi Zhang Chu-shan Yi Zhao-dong Wang Effect of process parameters on microstructure and properties of superalloy turbine guide castings by a novel electromagnetic oscillation method Journal of Materials Research and Technology Superalloy Turbine guide blade Investment casting Electromagnetic oscillation Grain refinement |
| title | Effect of process parameters on microstructure and properties of superalloy turbine guide castings by a novel electromagnetic oscillation method |
| title_full | Effect of process parameters on microstructure and properties of superalloy turbine guide castings by a novel electromagnetic oscillation method |
| title_fullStr | Effect of process parameters on microstructure and properties of superalloy turbine guide castings by a novel electromagnetic oscillation method |
| title_full_unstemmed | Effect of process parameters on microstructure and properties of superalloy turbine guide castings by a novel electromagnetic oscillation method |
| title_short | Effect of process parameters on microstructure and properties of superalloy turbine guide castings by a novel electromagnetic oscillation method |
| title_sort | effect of process parameters on microstructure and properties of superalloy turbine guide castings by a novel electromagnetic oscillation method |
| topic | Superalloy Turbine guide blade Investment casting Electromagnetic oscillation Grain refinement |
| url | http://www.sciencedirect.com/science/article/pii/S223878542402492X |
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