TY - JOUR
T1 - Recrystallization mechanism for the grain refinement in undercooled DD3 single-crystal superalloy
AU - Liu, Feng
AU - Guo, Xuefeng
AU - Yang, Gencang
PY - 2000/11/1
Y1 - 2000/11/1
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=0034325671&partnerID=8YFLogxK
U2 - 10.1016/S0022-0248(00)00759-4
DO - 10.1016/S0022-0248(00)00759-4
M3 - 文章
AN - SCOPUS:0034325671
SN - 0022-0248
VL - 219
SP - 489
EP - 494
JO - Journal of Crystal Growth
JF - Journal of Crystal Growth
IS - 4
ER -