Research of material inhomogeneity of reference samples made of wrought Ni-based superalloy VZH175-ID

Eroshkin S.G., Orlov G.V.
UDC
669.245
DOI
10.18577/2307-6046-2015-0-8-11-11
Article PDF (Russian) (415.76 KB)
How to cite
Eroshkin S.G., Orlov G.V. Research of material inhomogeneity of reference samples made of wrought Ni-based superalloy VZH175-ID // Proceedings of VIAM. 2015. No. 8. DOI: 10.18577/2307-6046-2015-0-8-11-11. URL: https://test.viam.ru/en/journal/2015/8/11
Abstract

Methods of spectral analysis are widely used at production of Ni-based superalloys to determine the chemical composition of the melt. Certified reference samples of material composition (CRMs) are used for plotting of calibration curves to make quantitative spectral analysis. Uncertainty of the certified values of CRMs affects significantly on the accuracy of quantitative analysis. The uncertainty of the inhomogeneity of the CRM composition is one of the components of the total uncertainty of the CRM certified value. In this work, a study of inhomogeneity of wrought Ni-based superalloy VZH175-ID was carried out with the use of X-ray fluorescence spectroscope S8 Tiger and measurement conditions were selected. The standard uncertainty of the heterogeneity was estimated. It was shown that the obtained level of the standard uncertainty of heterogeneity allows the usage of CRM material for development and production of state standard reference samples (SCRM) of the approved type.

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