1988 年 37 巻 413 号 p. 147-151
The X-ray elastic constants of high manganese austenitic cast steel were determined from γ(311) diffraction of CrKβ radiation by the complex oscillation technique using the ψ0 oscillation and specimen oscillation at the same time, and the accuracy of the measurement was examined.
The results obtained are summarized as follows.
(1) If materials have no residual texture from uniaxial plastic deformation, the value of the X-ray elastic constant KX (KX=-366MPa/deg) of austenitic steel adopted in the standard method of X-ray stress measurement is considered suitable for the high manganese austenitic steel which has been subjected to various plastic working treatments.
(2) For the X-ray stress measurement of the coarse grained high manganese austenitic steel subjected to heavy plastic deformation, the error in stress measurements Δσ is 20-50MPa, if the limit of confidence is set at 95%.