In the HAZ the tensile residual stresses are across the weld, so the hydrogen cracks are along the length of the weld. In weld metal the tensile residual stresses are along the weld, so the hydrogen cracks are across the weld.
In the HAZ the tensile residual stresses are across the weld, so the hydrogen cracks are along the length of the weld. In weld metal the tensile residual stresses are along the weld, so the hydrogen cracks are across the weld.