Multimodal size distributions of c0 precipitates during continuous cooling of UDIMET 720 Li

Rene Radis, Miroslava Schaffer, Mihaela Albu, Gerald Kothleitner, Peter Pölt, Ernst Kozeschnik

Research output: Contribution to journalArticle

Abstract

The technological properties of many nickel-based superalloys originate in the morphology and distribution of Ni3(Al, Ti) particles (c0precipitates). Starting from the solution-annealed condition, the distribution and the morphology of c0 precipitates are investigatedexperimentally during continuous cooling of the nickel-base superalloy UDIMET 720 Li. Characterization of the precipitates is carriedout by scanning electron microscopy and energy-filtered transmission electron microscopy investigations. Depending on cooling rate,monomodal, bimodal and even trimodal size distributions are observed. The experimental observations of the size distributions are confirmedby numerical simulations of the c0 precipitation kinetics. The theoretical background for occurrence of multimodal size distributionsduring continuous cooling is discussed.
Original languageEnglish
Pages (from-to)5739-5747
JournalActa Materialia
Volume57
DOIs
Publication statusPublished - 2009

ASJC Scopus subject areas

  • Materials Science(all)

Fields of Expertise

  • Advanced Materials Science

Treatment code (Nähere Zuordnung)

  • Basic - Fundamental (Grundlagenforschung)

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