Topologically inverse microstructure in single-crystal superalloys: microstructural stability and properties at ultrahigh temperature

Yi Ru; Bin Hu; Wenyue Zhao; Heng Zhang; Yanling Pei; Shusuo Li; Shengkai Gong; Huibin Xu

doi:10.1080/21663831.2021.1982785

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Topologically inverse microstructure in single-crystal superalloys: microstructural stability and properties at ultrahigh temperature

Original Report | 更新时间：2026-08-19

- Topologically inverse microstructure in single-crystal superalloys: microstructural stability and properties at ultrahigh temperature
- Materials Research Letters Vol. 9, Issue 12, Pages: 497-506(2021)
- 作者机构：
  
  1. b AECC Guizhou Liyang Aviation Power Company Limited
  2. a Research Institute for Frontier Science Beihang University
  3. a Research Institute for Frontier Science Beihang University Beijing People’s Republic of China
  4. c School of Materials Science and Engineering Beihang University
- 作者简介：
- 基金信息：
- DOI：10.1080/21663831.2021.1982785
  CLC：
- Online First：04 October 2021，
  
  Published：2021
- 稿件说明：
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Yi Ru, Bin Hu, Wenyue Zhao, et al. Topologically inverse microstructure in single-crystal superalloys: microstructural stability and properties at ultrahigh temperature[J]. Materials Research Letters, 2021, 9(12): 497-506.
DOI：

Yi Ru, Bin Hu, Wenyue Zhao, et al. Topologically inverse microstructure in single-crystal superalloys: microstructural stability and properties at ultrahigh temperature[J]. Materials Research Letters, 2021, 9(12): 497-506. DOI： 10.1080/21663831.2021.1982785.

摘要

Abstract

Topological phase inversion

in which γ'-precipitate becomes topological matrix phase

is a typical ‘detrimental’ microstructural degradation in Ni-based single-crystal superalloys. Here

a topologically inverse structure without service-induced damages is proposed. This structure exhibits excellent stress rupture properties at 1200°C and great microstructural stability

characterized by high

steady two-phase interface density. The relationship of the interface density to microscopic dislocation motion and macroscopic plastic deformation has been established

which reveals possible strengthening effect. These results will help understanding the benefit from this ‘degraded’ but quite stable microstructure and guide microstructure tuning against long-termed heat-resisted service.

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