Grain growth and static recrystallization kinetics in Co-20Cr-15W-10Ni (L-605) cobalt-base superalloy

Julien Favre, Damien Fabrègue, Eric Maire, Akihiko Chiba

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

The grain size evolution of cold-rolled L-605 cobalt-base superalloy during ultra-rapid annealing is investigated in this paper. Cold-worked specimens undergo static recrystallization, leading to grain refinement or grain coarsening depending on the annealing time and temperature. The kinetics of grain growth is found to be independent of the initial deformation. The evolution of grain size can be simply described by a grain growth model for high temperatures and long annealing times, and the mobility of interfaces is estimated by modelling. Fast annealing treatment process is a very promising technique to customize grain size and enhance mechanical strength. In particular, the reduction of annealing time is an efficient method to produce a refined microstructure through static recrystallization.

Original languageEnglish
Pages (from-to)1992-2008
Number of pages17
JournalPhilosophical Magazine
Volume94
Issue number18
DOIs
Publication statusPublished - 2014 Jun 23

Keywords

  • Ultra-rapid annealing
  • cobalt superalloy
  • grain growth
  • kinetics
  • recrystallization

ASJC Scopus subject areas

  • Condensed Matter Physics

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