Characterization of topologically close-packed phases and precipitation behavior of P phase in a Ni-based single crystal superalloy

Youjian Zhang, Jianxin Zhang*, Pan Li, Huixin Jin, Wenyang Zhang, Zihan Wang, Shengcheng Mao

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

Scanning electron microscopes (SEM) and transmission electron microscopes (TEM) were employed to investigate the topologically close-packed (TCP) phases in an experimental nickel base single crystal superalloy. Orientation relationships between P phase and matrix were found as (010)P//(11‾1)γ and [201]P//[110]γ, in which atomic arrangement of P phase obtains the optimal matching with that of γ/γ’ matrix and the semi-coherent interface forms, achieving the lower interface energy. The elemental composition, atomic arrangement of low index planes and the atomic attachment of P phase with matrix were analyzed in detail to investigate the atomic scale structure of the fast-growing semi-coherent interface and its effects on precipitate growth. Finally, the nucleation of P phase was discussed.

Original languageEnglish
Article number106887
JournalIntermetallics
Volume125
DOIs
Publication statusPublished - 2020 Oct
Externally publishedYes

Keywords

  • Electron microscopy
  • Interface structure
  • Orientation relationships
  • P phase
  • Superalloy

ASJC Scopus subject areas

  • Chemistry(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

Fingerprint

Dive into the research topics of 'Characterization of topologically close-packed phases and precipitation behavior of P phase in a Ni-based single crystal superalloy'. Together they form a unique fingerprint.

Cite this