| About this Abstract |
| Meeting |
MS&T23: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing of Metals: Microstructure, Properties and Alloy Development
|
| Presentation Title |
Identification of Phases in a NiCr-V FGM Fabricated via DED AM Through Experiments and Computational Modeling |
| Author(s) |
Beril Tonyali, Hui Sun, Zi-Kui Liu, Allison Beese |
| On-Site Speaker (Planned) |
Beril Tonyali |
| Abstract Scope |
In compositionally functionally graded materials (FGMs), the chemistry of a material changes as a function of position across a component, which can allow for spatial variation of its properties. However, due to mixing of dissimilar materials, brittle intermetallic phases form across many intermediate compositions in FGMs, resulting in poor mechanical properties. In this work, an FGM grading from Ni-20Cr to V was fabricated using directed energy deposition additive manufacturing (DED AM) and used to demonstrate the use of a feasibility diagram for path planning in a ternary system in which some compositions are known to form sigma phase under equilibrium and/or Scheil conditions. The FGM was experimentally characterized and compared to thermodynamic predictions from the feasibility diagram to evaluate its ability to predict phases along a composition gradient. |