About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
|
Computational Thermodynamics and Kinetics
|
Presentation Title |
J-22: Nanoscale Phenomena during Joining of Dissimilar Metallic Materials: A Molecular Dynamics Study |
Author(s) |
Jiayi Chen, Hemantha Kumar Yeddu |
On-Site Speaker (Planned) |
Jiayi Chen |
Abstract Scope |
Engineering components for novel applications can be designed by joining dissimilar metallic alloys using vacuum brazing and welding. Some applications are, e.g., axially laminated anisotropic rotor by joining steel and Inconel for novel electric motors, stainless steels or Co-Cr alloy welded/coated on carbon steel discs used in butterfly valves. In the present work the nanoscale phenomena, diffusion, precipitate-diffusion interplay, that occur during vacuum brazing and welding processes for joining steels and other alloys are studied using Molecular dynamics simulations. The simulation of vacuum brazing process shows that Nb in Inconel has high activation energy in the precipitate area, where the precipitate-induced atomic clusters consume energy from Cu and create high local energy density which impedes the diffusion between Cu and Inconel, in agreement with the findings in experiments. The steel disc coating study shows that the precipitate distribution is similar to the experimental results in the interface and boundary area. |
Proceedings Inclusion? |
Planned: |
Keywords |
Modeling and Simulation, Joining, Computational Materials Science & Engineering |