| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Environmentally Assisted Cracking: Theory and Practice
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| Presentation Title |
Characterizing Stress-assisted Grain Boundary Diffusion of Zinc During Liquid Metal Embrittlement of AHSS |
| Author(s) |
Gautham Mahadevan |
| On-Site Speaker (Planned) |
Gautham Mahadevan |
| Abstract Scope |
Liquid metal embrittlement poses a significant challenge in the automotive industry, particularly during resistance spot welding. Understanding the underlying stress-assisted grain boundary diffusion mechanism is crucial for developing alloys that do not show embrittlement. This study aims to validate the proposed mechanism by investigating the diffusion of zinc through grain boundaries under various microstructural and temperature conditions. Gleeble thermo-mechanical tests will be performed for different starting microstructures, percentages of alloying elements (Si), and temperature conditions with and without the Zn coating . The variation in the mechanical properties with microstructure and temperature will be studied in these thermo-mechanical tests.
Characterization techniques like Energy Dispersive Spectroscopy (EDS) and Electron Probe Micro-Analysis (EPMA), will be employed to analyze the differences in the diffusion of Zn and quantify its influence on LME. Furthermore, EBSD will be used to characterize the influence of microstructural features like grain boundary misorientation and texture on LME susceptibility.
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| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Mechanical Properties, Iron and Steel |