TY  - JOUR
A1  - Schröder, Nina
A1  - Rhode, Michael
A1  - Kannengießer, Thomas
A1  - Kromm, Arne
A1  - Kadoke, Daniel
A1  - Kruse, Julius
T1  - Effect of Ti microalloying on the local strain behavior of cross-weld tensile samples determined by digital image correlation
JF  - Welding in the World
N2  - High-strength low-alloyed (HSLA) steels with yield strength / proof stress ≥ 600 MPa are the basis of modern light-weight steel constructions. Indeed, the economic and ecological benefits strongly depend on their processability in terms of welding. In this context, the use of highly productive welding processes and suitable welding consumables is of vital interest and requires a fundamental understanding of the microstructural changes in the HSLA steel and especially the heat-affected zone (HAZ) of the welded joint. Microalloying elements, such as Ti or Nb, are essential to achieve the desired mechanical properties. To analyse the weldability, three-layer welds were performed using gas metal arc welding (GMAW) and critical microstructures, such as areas of the HAZ that exhibit significant softening or hardening, were identified. The effect of the softened HAZ region on failure was evaluated using cross-weld tensile specimens. Digital image correlation (DIC) was used for in-situ monitoring of the development and accumulation of the local strains in different HAZ regions during tensile testing. Using a specially designed mirror system, the local strains of the microstructure zones on the top and bottom of the weld were recorded simultaneously. In addition, the analysis of the local deformation helps to understand the effects of the softened HAZ on the global strain, the reduction in area, the fracture position, and the overall fracture behavior.
KW  - High-strength structural steel
KW  - Microalloying influences
KW  - HAZ-softening
KW  - Digital Image Correlation
KW  - Constraint effect
KW  - Thermodynamic simulation
PY  - 2025
UR  - https://nbn-resolving.org/urn:nbn:de:kobv:b43-643558
DO  - https://doi.org/10.1007/s40194-025-02185-1
SP  - 1
EP  - 17
PB  - Springer Nature
AN  - OPUS4-64355
LA  - eng
AD  - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER  -