| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
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Additive Manufacturing and Alloy Design: Bridging Fundamental Physical Metallurgy, Advanced Characterization Techniques, and Integrated Computational Materials Engineering for Advanced Materials
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| Presentation Title |
Solidification Condition Effect on Cracking Behavior in Rene 80 Thin-Wall Components Fabricated by Directed Energy Deposition |
| Author(s) |
Can Sun, Hamedreza Seyyedhosseinzadeh, Changjie Sun, Alexander L. Kitt, Lang Yuan |
| On-Site Speaker (Planned) |
Can Sun |
| Abstract Scope |
In this study, a strong correlation has been identified between cracking behavior and solidification conditions in directed energy deposition (DED) processed Rene 80 thin walls by exhibiting the effect of the temperature gradient (G) and solidification rate (vt) on microstructure characteristics, including grain and subgrain texture, morphology, and sizes. The results indicate that high G and vt would lead to refined grains with a low frequency of high misorientation angle degrees, effectively inhibiting the formation of cracks. Primary dendrite arm spacing (PDAS) and secondary dendrite arm spacing (SDAS), controlled by G and vt, impact the elemental segregation associated with cracking formation and interdendritic liquid permeability associated with potential cracking initiation site. Additionally, the simplified Rappaz-Drezet-Gremaud (RDG) criterion was applied and further demonstrated the relationship between cracking formation and solidification condition. These findings offer insights into inhibiting crack formation in DED-processed Ni-based superalloy by controlling solidification conditions. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Copper / Nickel / Cobalt, Solidification |