The comparison of two data processing techniques of magnetic method for elastic compressive stress determination

The two magnetic methods of compressive stress determination were compared. These methods are based on the separation of the magnetization processes contribution of 90° and 180° domain walls motion. The contribution is possible due to the sample simultaneous exposure to the quasi-static and alternating magnetic fields aligned with the load direction. The field dependencies of the measurement coil signals U∼(H) were obtained and subsequently mathematically processed. The means of maximafields absolute values, Hmean, proportional to the magnetoelastic field, Hσ, were calculated. The results obtained by different methodswere found to be equal.