| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
High Performance Steels
|
| Presentation Title |
Characterizing the Microstructural Evolution in Resistance Spot Welded MS1500 Advanced High Strength Steels |
| Author(s) |
Madyson G. Canulette, Gregory B. Thompson, Luke N Brewer |
| On-Site Speaker (Planned) |
Madyson G. Canulette |
| Abstract Scope |
MS1500 is an identified steel for various applications in the automotive industry to reduce the weight of the car body without comprising structural integrity. During manufacturing, this steel is resistively spot welded to meet various geometric build designs. While MS1500 is considered “fully martensitic”, TEM and atom probe tomography have revealed nanoscale carbide precipitates within ferritic regions that have transformed. The microstructural evolution of these regions over a weld joint is characterized and linked to the mechanical hardness. Furthermore, hydrogen ingression during welding alters the mechanical strength of the joint. To assess this hydrogen spatial distribution, a series of specimens were extracted at different location in the weld and electrolytically charged in a deuterium aqueous solution, where the hydrogen isotope could be tracked by atom probe tomography. We will discuss various identified hydrogen traps and how the microstructure forms such traps from the welding. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Iron and Steel, Characterization, Mechanical Properties |