Formation of Z-Phase Particles in a Martensitic 9% Cr Steel during Creep at 650°C and Their Influence on the Creep
- Authors: Fedoseeva A.E.1, Nikitin I.S.1, Dudova N.R.1, Kaibyshev R.O.1
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Affiliations:
- Belgorod State University
- Issue: Vol 2019, No 10 (2019)
- Pages: 932-938
- Section: Physical Foundations of Strength and Plasticity
- URL: https://journals.rcsi.science/0036-0295/article/view/173517
- DOI: https://doi.org/10.1134/S0036029519100069
- ID: 173517
Cite item
Abstract
Abstract—The mechanism of the nucleation of Z-phase (CrVN) particles in a martensitic 10Kh9K3V2MFBR steel (9 wt % Cr) during creep at a temperature of 650°C is studied. The nucleation mechanism of Z-phase particles at a creep temperature of 650°C is found to be restructuring of the crystal lattice of V(C,N) carbonitrides due to the diffusion of chromium atoms. The transformation of nanosized V(C,N) carbonitrides into Z-phase particles is shown to weakly contribute to the structural degradation in the steel and not to cause its premature fracture during creep at 650°C if at least 50% V(C,N) carbonitrides of the initial volume fraction of these particles are retained (even at a large average size (≈200 nm) of Z-phase particles).
About the authors
A. E. Fedoseeva
Belgorod State University
Author for correspondence.
Email: fedoseeva@bsu.edu.ru
Russian Federation, Belgorod, 308015
I. S. Nikitin
Belgorod State University
Email: fedoseeva@bsu.edu.ru
Russian Federation, Belgorod, 308015
N. R. Dudova
Belgorod State University
Email: fedoseeva@bsu.edu.ru
Russian Federation, Belgorod, 308015
R. O. Kaibyshev
Belgorod State University
Email: fedoseeva@bsu.edu.ru
Russian Federation, Belgorod, 308015