| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials Processing Fundamentals: Thermodynamics and Rate Phenomena
|
| Presentation Title |
Correlation of Bond Structures and Viscosity of Submerged Arc Welding Fluxes towards Shipbuilding Steels |
| Author(s) |
Hang Yuan, Yanyun Zhang, Cong Wang |
| On-Site Speaker (Planned) |
Hang Yuan |
| Abstract Scope |
Flux viscosity carries critical significance as it could affect formability and alloying element transfer behaviors during submerged arc welding, which constitutes the major joining technique for thick shipbuilding steel grades. It is widely accepted that viscosity is intrinsic to bonding structures. However, a validated model of the interplay between them remains at large. In the present investigation, the structure-viscosity correlation has been demonstrated by employing molecular dynamics calculations coupled with experimental measurements. Results show that bridging oxygen (O) and fluorine (F) positively correlates with the activation energy of viscous flow (Eη). Due to dilution effect of free F and the depolymerization effect of non-bridging F, the value of Eη is significantly lower than that of fluorine-free systems. Current findings corroborate the relationship between bond stability and Eη. Such insights could enrich our understanding towards bond-induced viscosity behaviors and offer viable strategies for designing welding fluxes from an intrinsic structural perspective. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Computational Materials Science & Engineering, Modeling and Simulation, High-Temperature Materials |