TY - GEN
T1 - Continuous dynamic recrystallization during warm deformation of tempered lath martensite in a medium carbon steel
AU - Lee, Un Hae
AU - Kamikawa, Naoya
AU - Miyamoto, Goro
AU - Furuhara, Tadashi
PY - 2012
Y1 - 2012
N2 - To understand the mechanisms of accelerated dynamic recrystallization behavior during the warm deformation of martensites, the tempered lath martensite of 0.4C steel (Fe-0.399%C-1.96%Mn in mass %) was deformed at 650°C in compression to different reductions, and microstructural evolution was investigated. During the deformation, an initial lath martensite structure with a complicated morphology was gradually changed into more equiaxed structure. After 50% reduction and above, an equiaxed, fine grained structure mainly surrounded by high-angle boundaries was uniformly formed with dislocation substructures, where the dislocation density in the grains is relatively low. Since there was no significant boundary migration during this process, this microstructural evolution can be termed as continuous dynamic recrystallization.
AB - To understand the mechanisms of accelerated dynamic recrystallization behavior during the warm deformation of martensites, the tempered lath martensite of 0.4C steel (Fe-0.399%C-1.96%Mn in mass %) was deformed at 650°C in compression to different reductions, and microstructural evolution was investigated. During the deformation, an initial lath martensite structure with a complicated morphology was gradually changed into more equiaxed structure. After 50% reduction and above, an equiaxed, fine grained structure mainly surrounded by high-angle boundaries was uniformly formed with dislocation substructures, where the dislocation density in the grains is relatively low. Since there was no significant boundary migration during this process, this microstructural evolution can be termed as continuous dynamic recrystallization.
KW - Dynamic recrystallization
KW - Grain refinement
KW - Lath martensite
KW - Warm deformation
UR - http://www.scopus.com/inward/record.url?scp=84859720116&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84859720116&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/KEM.508.124
DO - 10.4028/www.scientific.net/KEM.508.124
M3 - Conference contribution
AN - SCOPUS:84859720116
SN - 9783037853764
T3 - Key Engineering Materials
SP - 124
EP - 127
BT - Materials Integration
PB - Trans Tech Publications Ltd
T2 - Int. Symposium of GCOE: Materials Integration, in Conjunction with the 2nd Int. Symposium on Advanced Synthesis and Processing Technology for Materials, ASPT 2011 and the 8th Materials Science School for Young Scientists, KINKEN-WAKATE 2011
Y2 - 1 December 2011 through 2 December 2011
ER -