Residual Stress Changes in Fatigue. Volume 1. Residual Stress Measurements by X-Ray Diffraction in Notched Test Specimens

An experimental setup is described for performing stress measurements on notched test specimens under load using a TEC series 1600 x-ray diffraction system. Excellent results are being obtained for Ti-6Al-4V material, but measurements on 7475-t651 Al are complicated by a texturing problem. Also, som...

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Bibliographic Details
Main Authors: Dowling, N E, Dunn, D O
Format: Report
Language:English
Subjects:
Aircraft
AIRFRAMES
ALUMINUM ALLOYS
COMPUTERIZED SIMULATION
FAILURE (MECHANICS)
FATIGUE (MECHANICS)
FATIGUE LIFE
FATIGUE TESTS(MECHANICS)
MEASUREMENT
MECHANICS
PE61153N
PLASTIC DEFORMATION
PREDICTIONS
Properties of Metals and Alloys
RESIDUAL STRESS
SPECTRA
STRESS MECHANICS
STRESS TESTING
STRESSES
TITANIUM ALLOYS
WU106362
X RAY DIFFRACTION
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Summary:An experimental setup is described for performing stress measurements on notched test specimens under load using a TEC series 1600 x-ray diffraction system. Excellent results are being obtained for Ti-6Al-4V material, but measurements on 7475-t651 Al are complicated by a texturing problem. Also, some unusual effects are observed during plastic deformation which are not yet understood. The performance of the x-ray diffraction system is found to be quite good in general, but some minor problems are noted. See also Volume 2, ADA208346.