Induction-assisted direct laser deposition of Inconel 625 on DS Rene125: Microstructure, texture, and porosity control
This study pioneers directional substrate-engineered direct laser deposition (DLD) on DS-Rene 125 turbine blade, leveraging induction heating to extreme axial thermal gradients and suppress off-axis dendrite nucleation. Advanced characterization methods, including optical microscopy, SEM, and XRD(eq...
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| Language: | English |
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Elsevier
2025-07-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785425015972 |
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| author | Fareed Kermani Hossein Momeni Reza ShojaRazavi MohammadReza Borhani |
| author_facet | Fareed Kermani Hossein Momeni Reza ShojaRazavi MohammadReza Borhani |
| author_sort | Fareed Kermani |
| collection | DOAJ |
| description | This study pioneers directional substrate-engineered direct laser deposition (DLD) on DS-Rene 125 turbine blade, leveraging induction heating to extreme axial thermal gradients and suppress off-axis dendrite nucleation. Advanced characterization methods, including optical microscopy, SEM, and XRD(equipped with a goniometer), were employed to analyze the microstructural evolution. Microstructural observations revealed that the application of the induction coil significantly altered dendrite orientation, increasing the angle from 67° to 86° relative to the horizontal axis. Furthermore, the induction coil induced a Columnar-to-Equiaxed Transition (CET) delay, accompanied by a 32 % expansion of the columnar grain region. Induction coil enhances vertical thermal gradients, modifies melt pool dynamics, and induces vortex flows, enabling 100 % gas porosity elimination in DLD. Pole figure analysis demonstrated a 100 % enhancement in maximum texture intensity along the <100> crystallographic direction, while the <110> texture intensity diminished by 60 %. This indicates improved heat transfer along the z-axis and reduced lateral thermal dissipation, leading to a more prominent <100> texture and reduced equiaxed structure formation. |
| format | Article |
| id | doaj-art-94c9810ebef04eeb8a24319748b03da7 |
| institution | Kabale University |
| issn | 2238-7854 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-94c9810ebef04eeb8a24319748b03da72025-08-20T03:32:46ZengElsevierJournal of Materials Research and Technology2238-78542025-07-01372306231210.1016/j.jmrt.2025.06.175Induction-assisted direct laser deposition of Inconel 625 on DS Rene125: Microstructure, texture, and porosity controlFareed Kermani0Hossein Momeni1Reza ShojaRazavi2MohammadReza Borhani3Faculty of Materials & Manufacturing Technologies, Malek Ashtar University of Technology, IranFaculty of Materials & Manufacturing Technologies, Malek Ashtar University of Technology, IranCorresponding author.; Faculty of Materials & Manufacturing Technologies, Malek Ashtar University of Technology, IranFaculty of Materials & Manufacturing Technologies, Malek Ashtar University of Technology, IranThis study pioneers directional substrate-engineered direct laser deposition (DLD) on DS-Rene 125 turbine blade, leveraging induction heating to extreme axial thermal gradients and suppress off-axis dendrite nucleation. Advanced characterization methods, including optical microscopy, SEM, and XRD(equipped with a goniometer), were employed to analyze the microstructural evolution. Microstructural observations revealed that the application of the induction coil significantly altered dendrite orientation, increasing the angle from 67° to 86° relative to the horizontal axis. Furthermore, the induction coil induced a Columnar-to-Equiaxed Transition (CET) delay, accompanied by a 32 % expansion of the columnar grain region. Induction coil enhances vertical thermal gradients, modifies melt pool dynamics, and induces vortex flows, enabling 100 % gas porosity elimination in DLD. Pole figure analysis demonstrated a 100 % enhancement in maximum texture intensity along the <100> crystallographic direction, while the <110> texture intensity diminished by 60 %. This indicates improved heat transfer along the z-axis and reduced lateral thermal dissipation, leading to a more prominent <100> texture and reduced equiaxed structure formation.http://www.sciencedirect.com/science/article/pii/S2238785425015972Induction coilDirect laser depositionRene 125 superalloyInconel 625 superalloySolidification microstructureGas porosity |
| spellingShingle | Fareed Kermani Hossein Momeni Reza ShojaRazavi MohammadReza Borhani Induction-assisted direct laser deposition of Inconel 625 on DS Rene125: Microstructure, texture, and porosity control Journal of Materials Research and Technology Induction coil Direct laser deposition Rene 125 superalloy Inconel 625 superalloy Solidification microstructure Gas porosity |
| title | Induction-assisted direct laser deposition of Inconel 625 on DS Rene125: Microstructure, texture, and porosity control |
| title_full | Induction-assisted direct laser deposition of Inconel 625 on DS Rene125: Microstructure, texture, and porosity control |
| title_fullStr | Induction-assisted direct laser deposition of Inconel 625 on DS Rene125: Microstructure, texture, and porosity control |
| title_full_unstemmed | Induction-assisted direct laser deposition of Inconel 625 on DS Rene125: Microstructure, texture, and porosity control |
| title_short | Induction-assisted direct laser deposition of Inconel 625 on DS Rene125: Microstructure, texture, and porosity control |
| title_sort | induction assisted direct laser deposition of inconel 625 on ds rene125 microstructure texture and porosity control |
| topic | Induction coil Direct laser deposition Rene 125 superalloy Inconel 625 superalloy Solidification microstructure Gas porosity |
| url | http://www.sciencedirect.com/science/article/pii/S2238785425015972 |
| work_keys_str_mv | AT fareedkermani inductionassisteddirectlaserdepositionofinconel625ondsrene125microstructuretextureandporositycontrol AT hosseinmomeni inductionassisteddirectlaserdepositionofinconel625ondsrene125microstructuretextureandporositycontrol AT rezashojarazavi inductionassisteddirectlaserdepositionofinconel625ondsrene125microstructuretextureandporositycontrol AT mohammadrezaborhani inductionassisteddirectlaserdepositionofinconel625ondsrene125microstructuretextureandporositycontrol |