Blockiness and substructure in single-crystal castings of nickel heat-resistant alloys

Kuzmina N.A., Ostroukhova G.A.
UDC
539.26
DOI
10.18577/2307-6046-2022-0-7-13-26
Article PDF (Russian) (1.16 MB)
How to cite
Kuzmina N.A., Ostroukhova G.A. Blockiness and substructure in single-crystal castings of nickel heat-resistant alloys // Proceedings of VIAM. 2022. No. 7. DOI: 10.18577/2307-6046-2022-0-7-13-26. URL: https://test.viam.ru/en/journal/2022/7/2
Keywords
single crystal, crystallographic orientation, disorientation of subgrains, lauegram, x-ray diffraction, production technology of single crystal casting
Abstract

The paper defines two groups of defects characteristic of single crystals of NGC: substructure and blockiness. The most common causes of their occurrence are considered. The comparison of the main methods of substructure control: visual, swing and Laue and the results of determining the disorientation of the substructure by the method of swing relative to the longitudinal axis of the casting and the complete disorientation of the substructure determined by lauegrams is given. Based on the comparison, a conclusion is made about the limits of sensitivity during visual inspection of the structure.

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