Mapping Residual Stress Gradients in Automotive Components Via X-Ray Diffraction 2007-01-0802
Residual stress plays an important role in fatigue life resistance of automotive components. Due to the complex nature and combination of multiple processes used in the manufacturing of these components the residual stresses present may not always be uniform. Typically most components contain both surface and sub-surface stress gradients. This leads us to the conclusion that characterizing the residual stress at one location will not generate a sufficient understanding of the stresses present. Characterizing and understanding the stress gradients will help to manage the fatigue life of various components as well as help establish proper quality control practices to ensure the presence of beneficial residual stresses at critical locations.