The x-ray diffraction (XRD) technique
exploits the fact that when a metal is
under stress, applied or residual, the resultant
elastic strains are manifest as a
change in the spacing of the atomic
planes in the metallic crystal structure.
XRD is capable of providing direct measurement
of these modifications in interplanar
atomic spacing, and from this
quantity, the total stress (residual and applied)
on the metal can be obtained. XRD
techniques of residual stress measurement
offer the best possibility for providing
rapid, economical, accurate, and
high-resolution stress measurements on
thick-plate weldments.
The x-ray diffraction (XRD) techniqueexploits the fact that when a metal isunder stress, applied or residual, the resultantelastic strains are manifest as achange in the spacing of the atomicplanes in the metallic crystal structure.XRD is capable of providing direct measurementof these modifications in interplanaratomic spacing, and from thisquantity, the total stress (residual and applied)on the metal can be obtained. XRDtechniques of residual stress measurementoffer the best possibility for providingrapid, economical, accurate, andhigh-resolution stress measurements onthick-plate weldments.
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