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

Feng Liu, Xuefeng Guo, Gencang Yang

科研成果: 期刊稿件文章同行评审

22 引用 (Scopus)

摘要

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.

源语言英语
页(从-至)489-494
页数6
期刊Journal of Crystal Growth
219
4
DOI
出版状态已出版 - 1 11月 2000

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