About this Abstract |
Meeting |
TMS Specialty Congress 2024
|
Symposium
|
Accelerating Discovery for Mechanical Behavior of Materials 2024
|
Presentation Title |
Delineating the Alloying Elements on the Formation of Fe-Zn Intermetallics During the Liquid-metal Embrittlement of Advanced High-strength Steel |
Author(s) |
Seungchang Han, Sang-Ho Uhm, Du-Youl Choi, Tijmen Vermeij, Krzysztof Wieczerzak, Xavier Maeder, Dario Ferreira Sanchez, Daniel Grolimund, Tea-Sung Jun |
On-Site Speaker (Planned) |
Seungchang Han |
Abstract Scope |
Grain boundaries play a significant role in the behavior of polycrystalline materials and are often affected by intergranular degradation phenomena through liquid metal embrittlement (LME). Resistance spot welding is associated with rapid microscopic processes and drastic temperature changes, typically occurring in subsecond processing steps. The coexistence of solid substrate and liquid Zn phase further complicates direct observations at the microstructural scale. To gain more insights into the inhibition of LME and the associated nanoscopic microstructural changes in the Fe–Zn system, it is crucial to investigate these phenomena at a smaller scale. This study explores the LME behavior of two advanced high-strength steels with different chemical compositions. We reveal the presence of intermetallic phases at Zn-infiltrated grain boundaries, indicating high local stresses. Through cross-correlation-based high angular resolution electron backscatter diffraction (HR-EBSD), we confirm that boron addition can mitigate crack-initiating local stress heterogeneities arising from the intermetallic phase formation. |
Proceedings Inclusion? |
Definite: Other |