Investigation of the causes of cracks in welded joints of parts made of alloy HN62VMYUT-VD

Morozova L.V., Grigorenko V.B., Terekhin A.M.
UDC
620.165.79
DOI
10.18577/2307-6046-2022-0-10-13-22
Article PDF (Russian) (1.36 MB)
How to cite
Morozova L.V., Grigorenko V.B., Terekhin A.M. Investigation of the causes of cracks in welded joints of parts made of alloy HN62VMYUT-VD // Proceedings of VIAM. 2022. No. 10. DOI: 10.18577/2307-6046-2022-0-10-13-22. URL: https://test.viam.ru/en/journal/2022/10/2
Keywords
hot strength alloy HN62VMYUT-VD, structure, grain size, fractographic analysis, scanning electron microscopy, crack
Abstract

The causes of cracking of the material of parts of complex configuration made of heat-resistant and heat-resistant nickel-based alloy HN62VMUT-VD (EP708) after welding are investigated. To identify the causes of cracking, mechanical tests of samples from blanks of different melts were carried out, metallographic studies of blanks and finished parts were performed. A fractographic analysis of the surface of the exposed cracks was carried out. The grain size in different zones of the workpiece is investigated. Recommendations for the prevention of cracking are given.

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