Preparation of Universal Working Curves Used in XRFS Determination of Alloying Elements in Nickel-Base Superalloys——Application of FP-Virtual Synthetic Standard Sample

The FP-virtual synthetic standard sample was applied to the preparation of universal working curves used in XRFS determination of 18 alloying elements and 4 impurity elements in a variety of nickel-base superalloys. Optimum working conditions of the instrument and rational analytical spectral lines of the elements determined were chosen in the study. Correction coefficients of spectral overlapping of 9 elements with their coexisting elements were determined, and interferences caused by background and channel materials were eliminated by the Rayleigh scattering. After supposition of the contents of the alloying elements of the virtual synthetic standard sample and calculated values of their fluorescence intensity, their final fluorescence intensities were calculated by the algorithm of FP and the FP-working curves were obtained finally. The working curves of virtual synthetic standard sample were used in analysis of varieties of standard samples, results obtained were found in consistency with the certified values. It was proved that the FP-working curves were feasible to be used universally in the XRFS analysis of varieties of nicekl-base superalloys.