Review of Progress in Quantitative Nondestructive Evaluation
San Diego, CA
A new surface sensor probe comprising an angular array of Hall effect sensors has been developed for characterization of residual stresses in ferrous materials by means of stress‐induced magnetic anisotropy measurements. The sensor probe applies a radially spreading ac magnetic field to a test sample, and detects stray fields in different directions simultaneously to determine the principal stress axes. In situ measurements were conducted on a annealed steel plate under four‐point bending stresses to evaluate the probe performance. The ratio of stray field signals measured along and perpendicular to the stress axis varies linearly with the surface stress, indicating the possibility of characterizing residual stresses in ferrous components using the sensor array probe.
American Institute of Physics
Lo, Chester C.H., "Characterization of residual stresses in ferrous components by magnetic anisotropy measurements using a hall effect sensor array probe" (2010). Center for Nondestructive Evaluation Conference Papers, Posters and Presentations. 53.