1.1 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 ^hkl.

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Published:

12/01/2014

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6

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1 file , 120 KB

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2 files , 260 KB