Near Surface Residual Stress Measurement Using Slotting

BackgroundThere are various experimental measurement techniques used to measure residual stress and this work describes one such method, the slotting its application near surface stresses.ObjectiveThis examines macro-scale specimens.MethodsA series of numerical experiments were performed understand size required assume that specimen is infinitely large, namely thickness, width, height. To assess repeatability, 12 measurements in a shot peened aluminum plate.ResultsThe determined should have thickness greater than or equal 21.6 mm (0.85 in), total width (normal slot length) 44.5 (1.75 height (parallel slot) 38.1 (1.5 in) for be assumed infinite. Slotting repeatability was found maximum standard deviation 30 MPa at decays rapidly 5 depth 0.3 from surface. Comparison x-ray diffraction performed. ConclusionsInfinite plate dimensions length as well repeatability. shown significantly better X-ray with layer removal application.