About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Advanced Characterization With Synchrotron, Neutron, and In Situ Laboratory-scale Techniques IV
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| Presentation Title |
Influence of Injector Geometrical Feature on Residual Stress in LPBF IN625 Components |
| Author(s) |
Rui Feng, Kaimiao Liu, Dunji Yu, Yan Chen, Ritam Pal, Ke An, Chantal Sudbrack |
| On-Site Speaker (Planned) |
Rui Feng |
| Abstract Scope |
In gas turbine engines, fuel injectors ensure efficient fuel-air mixing and controlled combustion. Their mechanical performance is critical for optimal performance and reduced emissions. Additive manufacturing (AM), e.g., laser powder bed fusion (LPBF), enables fabrication of injectors with complex geometries, but introduces residual stresses due to non-uniform thermal cycles. Complex features—such as internal channels, sharp corners, varying curvatures, and build heights—can intensify thermal gradients and affect stress distribution. This study investigates how such injector geometric features in LPBF IN625 influence residual stress, using finite-element simulations and neutron diffraction measurements. Our results reveal that sharp corners and regions of high curvature around internal channels are prone to significant stress concentrations. Moreover, mid-height areas around the channels tend to accumulate higher residual stress compared to top or bottom regions. These findings offer insights into optimizing injector design and AM-process parameters to reduce residual stress and enhance part reliability and performance. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Characterization, Modeling and Simulation |