TY - JOUR
T1 - Numerical and experimental assessment of liquid metal embrittlement in externally loaded spot welds
AU - Prabitz, Konstantin Manuel
AU - Antretter, Thomas
AU - Rethmeier, Michael
AU - El-Sari, Bassel
AU - Schubert, Holger
AU - Hilpert, Benjamin
AU - Gruber, Martin
AU - Sierlinger, Robert
AU - Ecker, Werner
N1 - Publisher Copyright: © The Author(s) 2024.
PY - 2024/1/30
Y1 - 2024/1/30
N2 - Zinc-based surface coatings are widely applied with high-strength steels in automotive industry. Some of these base materials show an increased brittle cracking risk during loading. It is necessary to examine electrogalvanized and uncoated samples of a high strength steel susceptible to liquid metal embrittlement during spot welding with applied external load. Therefore, a newly developed tensile test method with a simultaneously applied spot weld is conducted. A fully coupled 3D electrical, thermal, metallurgical and mechanical finite element model depicting the resistant spot welding process combined with the tensile test conducted is mandatory to correct geometric influences of the sample geometry and provides insights into the sample’s time dependent local loading. With increasing external loads, the morphology of the brittle cracks formed is affected more than the crack depth. The validated finite element model applies newly developed damage indicators to predict and explain the liquid metal embrittlement cracking onset and development as well as even ductile failure.
AB - Zinc-based surface coatings are widely applied with high-strength steels in automotive industry. Some of these base materials show an increased brittle cracking risk during loading. It is necessary to examine electrogalvanized and uncoated samples of a high strength steel susceptible to liquid metal embrittlement during spot welding with applied external load. Therefore, a newly developed tensile test method with a simultaneously applied spot weld is conducted. A fully coupled 3D electrical, thermal, metallurgical and mechanical finite element model depicting the resistant spot welding process combined with the tensile test conducted is mandatory to correct geometric influences of the sample geometry and provides insights into the sample’s time dependent local loading. With increasing external loads, the morphology of the brittle cracks formed is affected more than the crack depth. The validated finite element model applies newly developed damage indicators to predict and explain the liquid metal embrittlement cracking onset and development as well as even ductile failure.
KW - Advanced high-strength steel
KW - Damage prediction
KW - Finite element simulation
KW - Liquid metal embrittlement
KW - Resistance spot welding
KW - Tensile resistance spot welding experiment
UR - http://www.scopus.com/inward/record.url?scp=85183625442&partnerID=8YFLogxK
UR - https://pureadmin.unileoben.ac.at/portal/en/publications/numerical-and-experimental-assessment-of-liquid-metal-embrittlement-in-externally-loaded-spot-welds(92c188fd-e12b-492d-873d-152bb00039cb).html
U2 - 10.1007/s40194-024-01696-7
DO - 10.1007/s40194-024-01696-7
M3 - Article
SN - 0043-2288
VL - 68.2024
SP - 2713
EP - 2722
JO - Welding in the world
JF - Welding in the world
IS - 10
ER -