Principle and Method of X-Ray Computer Tomography on Residual Stress Measurement

Yu-an Chen; Shang-qi Zhou; Qin Ren

doi:10.4028/www.scientific.net/MSF.490-491.208

Paper Titles

Ultrasonic Evaluation of Compressive Residual Stress of Surface Treated Metals
p.184

Determination of Volume Fraction of Constituents in Deformed Stainless Steel by Means of Image Plate
p.190

Residual Stresses Measurement Using an Indentation Made by an Impact Load
p.196

Measurement on X-Ray Stress Constant of Beryllium
p.202

Principle and Method of X-Ray Computer Tomography on Residual Stress Measurement
p.208

A New Method for Measuring Residual Stress Relaxation during Nanoindentation
p.213

Residual Stress Measurements in Australia: Present and Future
p.218

Comparative Neutron and Synchrotron X-Ray Diffraction Studies to Determine Residual Stress on an As-Welded AA2024 Plate
p.223

Neutron Stress Measurement Using Neutron Image Plate
p.229

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Principle and Method of X-Ray Computer Tomography on Residual Stress Measurement

Abstract:

X-ray computer tomography for non-destructively measuring residual stress with depth resolution was suggested to aim at improving of traditional X-ray stress analysis in this paper. Based on higher penetrating capacity of X-ray in low atomic order materials it could non-destructively measure three-dimensional residual stresses and calculate the stress free lattice spacing, d0, by current X-ray stress analyzer with taper slits. The evaluation of reliable results were controlled by three criteria, linear correlation coefficient, R, Poisson’ ratio, ν, and the stress free lattice spacing, d0. Finally, the residual stresses in the axial direction around the weld of arc Beryllium weldment could be calculated by this method.