Microsegregation of Alloying Elements on deformation Structural defects in Granular Nickel Alloy

I. L. Svetlov; Светлов И. Л.; D. V. Zaitsev; Зайцев Д. В.; M. M. Karashaev; Карашаев М. М.; A. I. Epishin; Епишин А. И.; N. V. Petrushin; Петрушин Н. В.

doi:10.31857/S0015323023600296

Microsegregation of Alloying Elements on deformation Structural defects in Granular Nickel Alloy

Authors: Svetlov I.L.¹, Zaitsev D.V.¹, Karashaev M.M.¹, Epishin A.I.², Petrushin N.V.¹
Affiliations:
1. NRC «KURCHATOV INSTITUTE» ALL-RUSSIAN SCIENTIFIC RESEARCH INSTITUTE OF AVIATION MATERIALS
2. The Institute of Structural Macrokinetics, Russian Academy of Sciences
Issue: Vol 124, No 6 (2023)
Pages: 517-523
Section: СТРУКТУРА, ФАЗОВЫЕ ПРЕВРАЩЕНИЯ И ДИФФУЗИЯ
URL: https://rjmseer.com/0015-3230/article/view/662947
DOI: https://doi.org/10.31857/S0015323023600296
EDN: https://elibrary.ru/WVJWFN
ID: 662947

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Abstract

Samples cut from a disk blank of Russian granulated nickel-based superalloy VZH178P were tested for tensile strength at room temperature and long-term creep at temperature of 750 °C. Transmission electron microscopy showed that, in both cases, stacking faults and microtwins formed during plastic deformation of the alloy. During long-term creep at 750 °C, the alloying elements Cr, Co, Mo, and W segregate on the stacking faults, leading first to the formation of Suzuki atmospheres and then to the nucleation and growth of TCP particles with stoichiometry (Co,Cr)3(Mo,W).

Keywords

powder-metallurgy nickel-base superalloys, plastic deformation, stacking faults, phase transformationsects, phase transformations

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