Microstructure, Hardness, and Residual Stress Distributions in T-Joint Weld of HSLA S500MC Steel

Intissar Frih (1) , Guillaume Montay (1) , Pierre-Antoine Adragna (1)

1 LASMIS - Laboratoire des Systèmes Mécaniques et d'Ingénierie Simultanée

This paper investigates the characterization of the microstructure, hardness, and residual stress distributions of MIG-welded high-strength low-alloy S500MC steel. The T-joint weld for 10-mm-thick plates was joined using a two passes MIG welding technology. The contour method was performed to measure longitudinal welding residual stress. The obtained results highlighted a good correlation between the metallurgical phase constituents and hardness distribution within the weld zones. In fact, the presence of bainite and smaller ferrite grain size in the weld-fusion zone might be the reason for the highest hardness measured in this region. A similar trend of the residual stress and hardness distributions was also obtained.

Domaines: Mécanique des matériaux [physics.class-ph]

Intissar Frih, Guillaume Montay, Pierre-Antoine Adragna. Microstructure, Hardness, and Residual Stress Distributions in T-Joint Weld of HSLA S500MC Steel. Metallurgical and Materials Transactions A, 2017, 48 (3), pp.1103-1110. ⟨10.1007/s11661-016-3932-6⟩. ⟨hal-02279346⟩