| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Materials Design and Alloy Development III -- Super Materials and Extreme Environments
|
| Presentation Title |
Computational Design and Additive Manufacturing-Enabled Fabrication of Functionally Graded Steel-to-Tungsten Joints for Fusion Energy Applications |
| Author(s) |
Dana Frankel, Marie Thomas, Pin Lu, Olga Eliseeva, Tanner Kirk, Raymundo Arroyave, Ibrahim Karaman |
| On-Site Speaker (Planned) |
Dana Frankel |
| Abstract Scope |
To enable advanced fusion energy technology, next-generation cooling systems for tokomak fusion reactors will utilize cooling system designs that require joining of tungsten-based plasma-facing armor to steel cooling structures. Conventional joining techniques result in substantial mismatch of thermal properties which can lead to cracking along the joint interface during operational cycles. Grading of the joint reduces thermal stresses, but linear steel-to-tungsten gradients can result formation of undesirable brittle phases. Computational design of an appropriate composition pathway is required to avoid brittle phases and optimize properties to create a robust joint. A computational path planning framework allows for optimization of properties through complex multidimensional composition space. A unique steel-to-tungsten gradient was designed using computational thermodynamic modeling tools and fabricated using directed energy deposition (DED)-based additive manufacturing (AM). Analysis indicates that the graded samples remain free of detrimental phases and thermally-induced cracking after extended cyclic testing. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Computational Materials Science & Engineering, |