Recrystallization in oxide dispersion strengthened nickel-base superalley MA760

Wei Sha*

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

The recrystallization behavior of a mechanically alloyed oxide dispersion strengthened Ni-base superalloy MA760 (Ni-19.51%Cr-6%Al-3.41%W-1.19%Fe-1.02%Y2O3(wt%)) has been investigated by using a combination of microscopy, calorimetry and hardness measurement techniques. It has been found that recrystallization occurs at very high temperatures and has a very fast kinetics. Recrystallization onset temperature increases with increasing heating rate, while recrystallized grain size decreases. The effects of pre-anneal have been found to be reducing the stored energy for recrystallization and the subsequent recrystallized grain size. To explain all these experimental observations, a model has been proposed considering grain boundary junction pinning during the initial stage of recrystallization process.

Original languageEnglish
Pages (from-to)87-94
Number of pages8
JournalRare Metals
Volume15
Issue number2
Publication statusPublished - 01 Apr 1996

ASJC Scopus subject areas

  • Materials Science(all)
  • Metals and Alloys

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