About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
High Performance Steels
|
| Presentation Title |
Microalloying Effects on Prior Austenite Grain Size in the Coarse Grained Heat Affected Zone of Thermomechanically Processed Steels |
| Author(s) |
Sawyer Gill, Jonah Klemm-Toole, Kip Findley, Greg Lehnhoff, Ripken Renner |
| On-Site Speaker (Planned) |
Sawyer Gill |
| Abstract Scope |
Toughness in the coarse-grained heat affected zone (CGHAZ) of welds in structural steels is strongly correlated with prior austenite grain size (PAGS). Microalloying additions are made to base metal chemistries to result in the desired microstructure and properties after thermomechanical processing (TMP), but different alloying strategies might be needed to control austenite grain growth in the CGHAZ. In this work, a series of TMP microalloy steels containing systematic variations in Nb, V, and Mo content were subjected to gas metal arc welding (GMAW) with heat inputs from ~10 – 100 kJ/in to evaluate the degree of austenite grain size control for specific microalloy constituents over a wide range of heat inputs. The results of this work are expected to highlight microalloying strategies that can be used to produce fine PAGS in the CGHAZ of structural steels to achieve high toughness required for demanding applications. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Iron and Steel, Mechanical Properties, Phase Transformations |