About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing: Design, Materials, Manufacturing, Challenges and Applications
|
| Presentation Title |
Effect of Dilution on Fabricated Functionally Graded Materials Compositions: Modelling and Mitigation Strategies Validated Using the Ni-, Fe-, Cu- Alloy System |
| Author(s) |
Zhening Yang, Zi-Kui Liu, Allison Beese |
| On-Site Speaker (Planned) |
Zhening Yang |
| Abstract Scope |
Direct energy deposition (DED) additive manufacturing (AM) allows composition to be changed between layers of a 3D component, enabling fabrication of functionally graded materials (FGMs). However, the remelting of the previous layer with a different composition when depositing the new layer can result in dilution, which results in the composition of the newly solidified layer deviating from the feedstock composition from the nozzles. In the fabrication of vertically graded FGMs, the dilution effect can accumulate between the layers, resulting in deviation from the designed compositional path (if the path is nonlinear), potentially entering into infeasible, in terms of cracking susceptibility, compositions. In this study, a dilution model was developed for multi-layer FGM samples. Factors that affect the solidified compositional path and methods for mitigating dilution effects were explored. The approach for calculating and mitigating dilution to fabricate desired FGMs was validated with samples within the Ni-, Fe-, Cu- alloy system. |