The micromagnetic measurement method is a well known technique for a qualitative estimation of
residual stresses in ferromagnetic materials. The application due to the advantages of a fast and
manageable use is hindered by the high complexity of the calibration procedure for the quantitative
residual stress determination when additionally a changing microstructure influences the measured
signals. Therefore basic investigations were performed for the residual stress determination of
welded joints by the micromagnetic method. A multi-parameter approach by using different
micromagnetic techniques was evaluated by a linear regression analysis. For each structural steel a
regression polynomial can be calculated for the residual stress determination of differently welded
specimens. The accuracy of the prediction depends on the magnetization direction. The
experimental results show, that this strategy enables a useful possibility of an easier method for the
determination of residual stresses in welded joints.
Comparison of Different Methods of Residual Stress Determination of Cold-Rolled Austenitic-Ferritic, Austenitic and Ferritic Steels
