| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
High Performance Steels
|
| Presentation Title |
Modeling Liquid Metal Embrittlement Cracks in Cross-tension Spot Weld Testing for Advanced High Strength Steels |
| Author(s) |
Kayla M. Molnar, Matthew L.S. Zappulla, Kip O. Findley |
| On-Site Speaker (Planned) |
Kayla M. Molnar |
| Abstract Scope |
While there are many studies to eliminate liquid metal embrittlement (LME) in 3rd generation steels, few studies investigate the influence of LME cracks on mechanical performance. Finite Element modeling was used to examine von Mises stresses at the LME crack tip and weld edge for a 3D cross-tension test. The objective was to identify a crack length and geometry at which the crack tip stress is higher than the weld edge stress, implying the crack degrades mechanical properties and changes the failure mode. Four parametric studies were conducted for each of the crack variables: center angle, arc angle, crack angle and crack length. Cross-tension samples of galvanized TRIP1180 steel, with shoulder LME cracks of various lengths (350 – 1400 μm), were tested quasi-statically for comparison. The results from the models support findings from previous literature and the experimental testing performed, where cracks larger than 1000 μm exhibited significant mechanical degradation. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Mechanical Properties, Modeling and Simulation, Iron and Steel |