About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
High Performance Steels
|
| Presentation Title |
Unraveling Intermetallic Grain-Boundary Precipitation-Induced Liquid Metal Embrittlement Below the Ductility Trough |
| Author(s) |
Seungchang Han, Yuki Ikeda, Amlan Das, Robert Maass |
| On-Site Speaker (Planned) |
Seungchang Han |
| Abstract Scope |
Liquid Metal Embrittlement is a long-standing structural degradation phenomenon in which Zn infiltrates a susceptible steel substrate, leading to grain boundary degradation that promotes fracture. It has gained renewed interested since new advanced steel grades for the automotive sector have shown to be susceptible to this damage mechanism. Our recent work captured signatures of nano-precipitates related to the embrittling phenomenon, providing evidence of phase nucleation within the GB network through in-depth characterization using TEM and thermodynamic modeling (Materials Today Advances 13, 100196, 2022; Acta Materialia 259 (2023) 119243; Acta Materialia 296 (2025) 121134; Scripta Materialia 265 (2025) 116723). We now transfer this insight to the bulk scale, both in terms of microstructural mechanisms and in terms of macroscopic property deterioration. We use synchrotron X-ray diffraction to identify early-stage intermetallic phase formation prior to Zn melting and demonstrate that thermally-induced weakening of galvanized steels becomes statistically significant already under these conditions. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Iron and Steel, Characterization, Mechanical Properties |