Predicting liquid metal embrittlement severity in resistance spot welding using hot tensile testing data

Optimization of Hot Forming Temperature to Minimize Liquid Metal Embrittlement Induced Cracking in Resistance Spot Welded Zinc‐Coated Medium Manganese Steel

“…As reported in literature, [ 40,48,49 ] the LME susceptibility of zinc‐coated steels during RSW could be quantified by high‐temperature tensile testing, provided that the thermal–mechanical load cycles during these tests are relevant for welding. In the current investigation, high‐temperature tensile tests of the samples at several test temperatures, between 600 °C and 850 °C, were conducted using a Gleeble3800 thermomechanical simulator and test settings as inferred in ref.…”

“…Whether or not these thermal-mechanical conditions lead to LME cracking, is also dependent on material-related factors, including the substrate microstructure, [35][36][37] substrate composition, [38,39] and zinc layer properties. [40,41] In refs. [42][43][44][45], it is discussed that the LME cracks are most likely initiated by stress-assisted zinc diffusion along high energy grain boundaries of the substrate, leading to a lack of grain boundary (GB) cohesion, after which liquid zinc fills the LME cracks, allowing them to grow further.…”