TY  - JOUR
AB  - This study investigates the effects of liquid metal embrittlement (LME) cracks on the mechanical performance of resistance spot-welded joints in zinc-coated advanced high-strength steel (AHSS) at the component level. To this end, a novel component-level test specimen featuring a hat and L-shaped profile was developed to identify critical failure points under three-point bending loads. Load-bearing capacity tests were subsequently conducted under both quasi-static and impact loading conditions, specifically targeting LME cracks with an average depth reaching 63.6% of the sheet thickness. By monitoring the surface strain of spot welds affected by LME cracks, the study visualizes stress concentration effects at the crack tips and traces the propagation of these cracks into the base material, which ultimately leads to material tearing and joint failure. The findings reveal that the effect of LME cracks in reducing load-bearing capacity is more pronounced under impact loading than under quasi-static loading, highlighting a previously underexplored aspect of LME behavior under impact loading. Specifically, the peak load decreased by 3.9% and 10.8%, while energy absorption declined by 52.2% and 78.3% under quasi-static and impact loading, respectively.
AU  - Yang, Keke
AU  - Sowada, Matthias
AU  - Olfert, Viktoria
AU  - Seitz, Georg
AU  - Schreiber, Vincent
AU  - Heitmann, Marcel
AU  - Hein, David
AU  - Biegler, Max
AU  - Jüttner, Sven
AU  - Rethmeier, Michael
AU  - Meschut, Gerson
DO  - 10.17619/UNIPB/1-2193
PB  - Universitätsbibliothek
DP  - Universität Paderborn
LA  - eng
PY  - 2025
SN  - 2214-0697
SP  - 1 Online-Ressource (Seite 8321-8328) Illustrationen
T2  - Journal of Materials Research and Technology
TI  - Influence of liquid metal embrittlement on the failure behavior of dissimilar spot welds with advanced high-strength steel: a component study
UR  - https://nbn-resolving.org/urn:nbn:de:hbz:466:2-54045
Y2  - 2026-02-05T11:37:04
ER  -