抄録
In the X-ray stress measurements heretofore in use, the plane containing incident X-ray beams was the same with the one on which the counter scanned. Ulrich Wolfstieg has conducted a stress measurement of the cog valleys of a gear, adapting the Schulz method (Reflection Method) of the pole figure attachment. One of the features of this measuring method is that the plane containing incident X-ray beams and the plane on which the counter scans cross at right angles each other, and that the passage of diffracted X-rays as a result are not intercepted by the projecting parts of the sample.
The next feature is that the absorption of the diffracted X-rays by the sample has no effect on stress values. One more feature is that, though in the stress measurement heretofore in use the incidence angle of X-ray ψ0 was ψ0<π/2-η, in this method it is possible to make ψ0=π/2. The authors, having been engaged in the development of X-ray stress measuring apparatus by the parallel method so far, have just completed the development of an apparatus which can be used for the measurement by the Side Inclining method, or a modified Schulz method, as well as the ordinary X-ray stress analyzer (Strainflex).
Features of this apparatus are:
(1) That it can conduct both ordinary X-ray stress measurements and Side Inclining measurements.
(2) That it can conduct the determination of retained austenite simultaneously with stress measurements.
(3) That the measurements by the Sin2ψ method, Schaal method, Side Inclining method, etc. can be conducted, being linked directly and all automatically until the completion of measurements. The X-ray intensity values measured by step scanning, are punched in the data tape and can be analyzed by electronic computers.
(4) That all of the measuring apparatus and accessories are mounted on a wagon and it can be moved to any arbitrary measuring places.
The official examination of the reliability of this apparatus as a stress measuring apparatus was conducted by corresponding the mechanical stress measured by a strain gauge to the X-ray stress analysis by this apparatus, and the correspondence of the results was very good. The measured value of retained austenite can be obtained by the integrated intensity ratio of diffracted beams on both plane α {211} and plane γ {220}, using the Cr target.
