| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
High Performance Steels
|
| Presentation Title |
A Model Case for Liquid-Metal Embrittlement: Early Grain-Boundary Structure Evolution in a Binary Iron-Zinc System |
| Author(s) |
Yuki Ikeda, Reza Darvishi Kamachali, Robert Maass |
| On-Site Speaker (Planned) |
Yuki Ikeda |
| Abstract Scope |
Societal demands for stronger steels drive the development of 3rd-generation advanced high-strength steels. In addition to their superb strength-ductility combinations, an excellent corrosion resistance is granted via galvanization. Whilst satisfying the requirement for most applications, these steels can undergo Zn liquid-metal embrittlement (LME) during a joining process in which the Zn-coating melts. Our recent investigations of spot-welded samples in concert with thermodynamical simulations proposed a GB phase-formation induced by a pronounced segregation transition to be the cause for LME property degradation (Mat. Today Adv. 13 (2022) 100196; Acta Mater. 259 (2023) 119243; Scripta Mater. 238 (2024) 115758). This phase formation occurs at temperatures below the ductility-trough. To give experimental evidence for this mechanism, the grain-boundary evolution in a Fe-Zn binary is tracked in-situ inside a TEM during heating. Here we discuss the observed microstructural evolution for temperatures up to 500C and its connection to LME. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Iron and Steel, Phase Transformations |