抄録
A promising, practical method of poly-chromatic X-ray (or white X-ray) stress measurement has been proposed and tested experimentally.
The followings are its characteristic features when compared with the mono-chromatic X-ray stress measurement.
(1) No mechanical scanning of the detector is necessary.
(2) The accuracy is independent of diffraction angle.
(3) The diffraction angle is better to be kept constant for all the sample inclination angles in practical stress measurements.
(4) The energy difference appearing as the difference in angle is proportional to stress.
(5) A fairly large sample mis-setting is permitted if the parallel beam slits with wide windows are employed.
(6) The residual stress distribution in the sub-surface (up to 30 microns depth) of the lathe-machined and sand paper polished stainless steel (SUS 304L) can be measured non-destructively.
