Influence of cobalt addition on microstructure and hot workability of IN713C superalloy

Yunping Li, Xianjuan Ye, Jiaxiang Li, Yi Zhang, Yuichiro Koizumi, Akihiko Chiba

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)

Abstract

In the present research, the influence of Co addition on the microstructure and hot workability of IN713C alloy was investigated in detail by scanning electron microscope (SEM), transition electron microscope (TEM) and electron backscattering diffraction (EBSD) etc. Substitution of Ni by Co leads to lower driving force for formation of γ′ phase. In addition, with the increase of Co fraction, the γ′ phase precipitates turned finer and more cuboidal shape. As a result, the hot workability of IN713C alloy was improved significantly by Co addition. This can be ascribed to the decrease in activation energy, misfit between γ/γ′ phase lattice, the stacking fault energy as well as the fraction of γ′ phase at elevated temperature after adding Co.

Original languageEnglish
Pages (from-to)340-346
Number of pages7
JournalMaterials and Design
Volume122
DOIs
Publication statusPublished - 2017 May 15

Keywords

  • Cobalt addition
  • DRX
  • Hot workability
  • Misfit
  • SFE
  • Superalloy

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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