Determining Stresses in the Presence of Nonlinearities in Interplanar Spacing vs. SIN Squared PSI.
Abstract
The physical meaning of non-linearities in d vs. sin sub 2 psi lines, encountered in X-ray measurements of surface residual stresses in polycrystalline materials is investigated. It is shown that when oscillations are present in any one reflection, switching to another reflection to obtain a straight line in d vs. sin sub 2 psi is feasible only under very special conditions. The authors also discuss the effect of quasi-homogeneous strain distributions and investigate the effects of psi-range on the accuracy of X-ray residual stress measurements when psi-splitting is present. A new geometric error is also discussed that can not be detected by the annealed powder method often used for alignment.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 29, 1983
- Accession Number
- ADA132365
Entities
People
- I. C. Noyan
- Jerome B. Cohen
Organizations
- Northwestern University