Unique precipitations in a novel refractory Nb-Mo-Ti-Co high-entropy superalloy

N. Yurchenko; E. Panina; Ł. Rogal; L. Shekhawat; S. Zherebtsov; N. Stepanov

doi:10.1080/21663831.2021.2022033

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Unique precipitations in a novel refractory Nb-Mo-Ti-Co high-entropy superalloy

Original Reports | 更新时间：2026-08-19

- Unique precipitations in a novel refractory Nb-Mo-Ti-Co high-entropy superalloy
- Materials Research Letters Vol. 10, Issue 2, Pages: 78-87(2022)
- 作者机构：
  
  1. a Laboratory of Bulk Nanostructured Materials Belgorod National Research University
  2. b Institute of Metallurgy and Materials Science Polish Academy of Sciences
- 作者简介：
- 基金信息：
- DOI：10.1080/21663831.2021.2022033
  CLC：
- Online First：17 January 2022，
  
  Published：2022
- 稿件说明：
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N. Yurchenko, E. Panina, Ł. Rogal, et al. Unique precipitations in a novel refractory Nb-Mo-Ti-Co high-entropy superalloy[J]. Materials Research Letters, 2022, 10(2): 78-87.
DOI：

N. Yurchenko, E. Panina, Ł. Rogal, et al. Unique precipitations in a novel refractory Nb-Mo-Ti-Co high-entropy superalloy[J]. Materials Research Letters, 2022, 10(2): 78-87. DOI： 10.1080/21663831.2021.2022033.

摘要

Herein

a novel refractory Nb

(at. %) high-entropy superalloy (RHESA) is introduced. Annealing at 1200 °C led to the precipitation of a semi-coherent individual (Co

Ti)-rich B2

(Ti

O)-rich fcc (Ti-rich oxides)

and hierarchical B2 + fcc nanoparticles in the (Nb

Mo)-rich RHESA bcc phase. B2 + fcc dispersoids were

dominant

and they nucleated heterogeneously because of the coherency ensured by the Baker–Nutting orientation relationship. The emergence of multi-type nanoprecipitates doubled the room-temperature compressive ductility without sacrificing strength. Our study can solve a chief problem of current RHESAs—the low stability of B2 dispersoids at T 700 °C.

Abstract

Herein

a novel refractory Nb

(at. %) high-entropy superalloy (RHESA) is introduced. Annealing at 1200 °C led to the precipitation of a semi-coherent individual (Co

Ti)-rich B2

(Ti

O)-rich fcc (Ti-rich oxides)

and hierarchical B2 + fcc nanoparticles in the (Nb

Mo)-rich RHESA bcc phase. B2 + fcc dispersoids were dominant

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Related Institution

a Multidisciplinary Research Center – Cardinal Stefan Wyszynski University in Warsaw

a Multidisciplinary Research Center – Cardinal Stefan Wyszynski University in Warsaw Warsaw Poland

b Institute of High Pressure Physics Polish Academy of Sciences

c PSL Research University Chimie ParisTech CNRS Institut de Recherche de Chimie Paris

a State Key Laboratory of Metastable Materials Science and Technology & School of Materials Science and Engineering Yanshan University

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