Precipitation behavior of a novel cobalt-based superalloy subjected to prior plastic deformations

Huakang Bian, Yunping Li, Daixiu Wei, Yujie Cui, Fenglin Wang, Shihai Sun, Kenta Yamanaka, Yuichiro Koizumi, Akihiko Chiba

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

The precipitation behavior of a novel cobalt-based superalloy subjected to prior plastic deformations was investigated in details by using field emission scanning electron microscope (FE-SEM), transmission electron microscope (TEM), etc. The precipitation of a μ-phase, which appeared at temperatures of 1073–1373 K, was confirmed, while MC-type carbide was observed at the temperatures > 1173 K. The prior plastic deformations promoted the precipitation of the μ-phase during subsequent aging. Further, the precipitation of the μ-phase at temperatures lower than 1173 K was confirmed to occur predominantly along the {111} slip bands; this was the dominant deformation mechanism of this alloy during plastic deformation. In contrast, there was no evidence that the precipitation of the MC-type carbide was affected by the prior plastic deformations in the case of the specimens exposed at 1273 and 1373 K.

Original languageEnglish
Pages (from-to)1-10
Number of pages10
JournalMaterials and Design
Volume112
DOIs
Publication statusPublished - 2016 Dec 15

Keywords

  • Cobalt-based superalloy
  • Prior plastic deformations
  • Suzuki segregation
  • TCP phase
  • μ-Phase

ASJC Scopus subject areas

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

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