Recrystallization mechanism for the grain refinement in undercooled DD3 single-crystal superalloy

Feng Liu, Xuefeng Guo, Gencang Yang

Research output: Contribution to journalArticlepeer-review

22 Scopus citations

Abstract

An investigation of the grain refinement in the bulk undercooled DD3 single-crystal superalloy is performed. The application of a molten salt denucleating technique combined with thermal cycle enables such investigation over a wide range of undercooling up to 210 K. The microstructure formation has been discussed with respect to undercooling, nucleation and recalescence as well as recrystallization during recalescence and post-recalescence, respectively. Furthermore, TEM and SEM techniques are employed to reveal the recrystallization mechanism for grain refinement occurring at the critical undercooling ΔT*, and to explain the influence of Υ′ precipitation and solute segregation on the recrystallization, i.e. grain-boundary migration process.

Original languageEnglish
Pages (from-to)489-494
Number of pages6
JournalJournal of Crystal Growth
Volume219
Issue number4
DOIs
StatePublished - 1 Nov 2000

Fingerprint

Dive into the research topics of 'Recrystallization mechanism for the grain refinement in undercooled DD3 single-crystal superalloy'. Together they form a unique fingerprint.

Cite this