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Zonal macrostructural heterogeneity of products of nickel-based superalloys manufactured by powder metallurgy and causes of its formation
https://doi.org/10.22349/1994-6716-2025-123-3-49-57
Abstract
In the macrostructure of products manufactured from powder obtained by the PREP (Plasma Rotating Electrode Process) method, when conducting macrostructure control, it is sometimes possible to observe zones of different etchability. Studying the microstructure in the zone containing both light and dark areas showed that in terms of grain size and shape it is typical for products manufactured by the powder metallurgy method, however, grains from dark areas have clearly defined boundaries due to the increased content of carbides. Additional carbides are formed during the coking of sublimates at the stage of gas-static treatment. The finished product inherits zonal heterogeneity caused by a gradual increase in the amount of sublimates of lubricants in the atmosphere of the spray chamber.
About the Authors
D. V. Ryndenkov
Stupino Metallurgical Company (JSC CMK)
Russian Federation
Russian Federation
Cand Sc.
2 Pristanitsionnaya St, 142800 Stupino, Moscow Region
D. A. Karyagin
Stupino Metallurgical Company (JSC CMK)
Russian Federation
Russian Federation
2 Pristanitsionnaya St, 142800 Stupino, Moscow Region
M. O. Smirnov
Stupino Metallurgical Company (JSC CMK)
Russian Federation
Russian Federation
Cand Sc.
2 Pristanitsionnaya St, 142800 Stupino, Moscow Region
E. N. Volkova
Stupino Metallurgical Company (JSC CMK)
Russian Federation
Russian Federation
2 Pristanitsionnaya St, 142800 Stupino, Moscow Region
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Review
For citations:
Ryndenkov D.V., Karyagin D.A., Smirnov M.O., Volkova E.N. Zonal macrostructural heterogeneity of products of nickel-based superalloys manufactured by powder metallurgy and causes of its formation. Voprosy Materialovedeniya. 2025;(3(123)):49-57. (In Russ.) https://doi.org/10.22349/1994-6716-2025-123-3-49-57
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