2014 Edition, December 1, 2014
Standard Test Method for Determining the X-Ray Elastic Constants for Use in the Measurement of Residual Stress Using X-Ray Diffraction Techniques
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Description / Abstract:
This test method covers a procedure for experimentally
determining the x-ray elastic constants (XEC) for the
evaluation of residual and applied stresses by x-ray diffraction
techniques. The XEC relate macroscopic stress to the
strain measured in a particular crystallographic direction in
polycrystalline samples. The XEC are a function of the elastic
modulus, Poisson's ratio of the material and the hkl plane selected
for the measurement. There are two XEC that are referred
to as 1⁄2 S2 hkl and S1