About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Advances in Ferrous Process Metallurgy
|
| Presentation Title |
Modeling Weld Oxygen Transfer in Submerged Arc Welding of High Strength Low Alloy Steels Using a Process Informed CALPHAD Method |
| Author(s) |
Thomas S. Avey, Daniel Bechetti, Charles Fisher |
| On-Site Speaker (Planned) |
Thomas S. Avey |
| Abstract Scope |
The development of novel high strength low alloy steels (HSLAs) has been accelerated to meet increasing demands for higher performance in the shipbuilding industry. The development of new welding systems needs to speed up to ensure HSLAs can be efficiently fabricated into large complex structures. Submerged arc welding (SAW) is a welding process where fusion is achieved by striking an arc between the work piece and an electrode while within a covering of molten flux. This molten flux and the melt pool interact to exchange oxygen and other elements resulting in chemistry modifications, oxide inclusions, and slag formation. In HSLAs the weld microstructure is dependent on the oxygen and oxide levels during solidification. By modeling the role of flux chemistry and weld process parameters on weld oxygen levels via a Calculation of Phase Diagrams (CALPHAD) approach, novel flux/electrode systems can be screened enabling an increased pace of weld system development. |