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.
|Number of pages||8|
|Publication status||Published - 01 Apr 1996|
ASJC Scopus subject areas
- Materials Science(all)
- Metals and Alloys