Particulars of the precipitation strengthening γʹ-phase during aging of heat-resistant wrought nickel superalloy VZh175-ID

Kablov E.N., Letnikov M.N., Ospennikova O.G., Bakradze M.M., Shestakova A.A.
Kablov E.N., Letnikov M.N., Ospennikova O.G., Bakradze M.M., Shestakova A.A. Particulars of the precipitation strengthening γʹ-phase during aging of heat-resistant wrought nickel superalloy VZh175-ID // Proceedings of VIAM. 2019. No. 9. DOI: 10.18577/2307-6046-2019-0-9-3-14. URL: https://test.viam.ru/en/journal/2019/9/1
Keywords
Ni superalloy, gamma prime, aging, cooling rate, mechanical properties, alloy VZh175-ID.
Abstract

The effect of aging at various temperatures on the size, morphology of the strengthening particles of the γʹ-phase and the mechanical properties of the heat-resistant wrought nickel superalloy VZh175-ID was studied. It is shown that the hardening effect during aging at different temperatures varies and depends on the microstructure which formed in the alloy VZh175-ID superalloy at the quenching stage. The excellent tensile strength and strength to rupture is achieved when small spherical or cuboid secondary γʹ-phase and nanosized tertiary γʹ-phase are formed in the structure.

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