Influence of the Post-Weld Treatment Process on the Deformation and Stresses of Structural Steel T-Joints
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Key Points
This research aims to evaluate how post-weld treatment processes affect deformation and residual stresses in structural steel T-joints.
T-joints were welded using 135 (MAG) methods with five different steel grades: S235JR, S355J2+N, S460NL, S690QL, S960QL.
Post-weld heat treatment (PWHT) and High-Frequency Mechanical Impact (HFMI) processes were applied and measured for flatness and straightness deviations.
A numerical analysis was conducted using a three-dimensional finite element method (FEM) model for the S355 steel variant.
HFMI processing significantly reduces deformation compared to traditional PWHT.
Numerical analysis confirmed HFMI reduces stress levels in welded joints, though PWHT is more effective for stress reduction.
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Implication
Randomized trial examines deformation and stress levels in steel T-joints, indicating HFMI is effective for treatment.