Topologically close-packed phase precipitation in Ni-based superalloys

Fei Sun, Jianxin Zhang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

10 Citations (Scopus)

Abstract

The addition of refractory elements is effective in improving the comprehensive performance of Ni-based superalloys, and meanwhile, the precipitation trend of TCP phases increases with the elements content due to the segregation of refractory elements during high temperature service. The precipitation of TCP phases obviously decreased the creep properties and creep rupture life of superalloys. The toughness and plastic of superalloys also dramatically deteriorated. The addition of Ruthenium (Ru) is shown to suppress the formation of TCP phases in Ni-based superalloys, resulting in much improved the creep resistance and the microstructural stability. The studies on TCP phases in Ni-based superalloys including crystallography and precipitation of TCP phases and the effect of alloy composition on TCP phases are reviewed.

Original languageEnglish
Title of host publicationKey Engineering Materials and Computer Science
Pages26-32
Number of pages7
DOIs
Publication statusPublished - 2011
Externally publishedYes
Event2011 International Conference on Key Engineering Materials and Computer Science, KEMCS 2011 - Dalian, China
Duration: 2011 Aug 62011 Aug 7

Publication series

NameAdvanced Materials Research
Volume320
ISSN (Print)1022-6680

Conference

Conference2011 International Conference on Key Engineering Materials and Computer Science, KEMCS 2011
CountryChina
CityDalian
Period11/8/611/8/7

Keywords

  • Refractory elements
  • Ruthenium (Ru)
  • Segregation
  • Superalloys
  • TCP phases

ASJC Scopus subject areas

  • Engineering(all)

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