About this Abstract |
Meeting |
MS&T22: Materials Science & Technology
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Symposium
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Additive Manufacturing of Metals: Microstructure, Properties and Alloy Development
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Presentation Title |
A Compositional and Microstructural Understanding of Powder-blown Directed Energy Deposition (DED) Used for Functionally Graded Ni-superalloys Alloys for Hot-and-harsh Gas Path Environments |
Author(s) |
Marissa Brennan, Chen Shen, Shenyan Huang, Michael Knussman, Daniel Ruscitto, Alex Kitt, Changjie Sun, Lee Kerwin, Anindya Bhaduri, Siyeong Ju, Hyeyun Song, Lang Yuan |
On-Site Speaker (Planned) |
Marissa Brennan |
Abstract Scope |
Powder-blown directed energy deposition (DED) enables parts to be processed with unique composition and properties tailored for specific performance needs. In particular, the layer-by-layer technique may be fine-tuned to create functionally graded material (FGM) structures. FGMs are advantageous for eliminating sharp interfaces inherent of welding of two or more components together, reducing coefficient of thermal expansion (CTE) induced residual stresses, while subsequently lowering the cost by using hybrid materials. FGM path design is intended to minimize undesirable phase formation inherent of hot-and-harsh gas path (HGP) environments which reduce the life of components. This study elaborates on the manufacturing and characterization (i.e. EBSD, SEM/EDS, EPMA, and hardness) of compositionally grade IN718/R41 (low γ’ to medium γ’) strengthened Ni-based superalloy FGMs processed by powder-blown DED. Compositional and microstructural evidence provided input for machine learning (ML) algorithms for further development and predictions of process parameters for printing FGM structures. |