Application of Neuber's effective stress method for the evaluation of the fatigue behaviour of magnesium welds

Finally, S-N lines were derived by correlating effective stresses with fatigue life for the worst case with R = 0.5 to account for possible high tensile residual stresses. The scatters of these S-N lines were calculated and compared for every ρ∗ iteration. The length value that resulted in the minimum scatter corresponded to the microstructural length. The identified microstructural length was ρ∗ = 0.12 mm. Until now, there were no published results for microstructural length of magnesium welded joints and the findings in this paper can be used to replace the current recommendations regarding magnesium welded joints.