TY - JOUR
T1 - Effect of hot working on dynamic recrystallisation study of as-cast austenitic stainless steel
AU - Mandal, Gopi
AU - Stanford, Nicole
AU - Hodgson, Peter
AU - Beynon, John
PY - 2012/10/30
Y1 - 2012/10/30
N2 - Dynamic recrystallisation (DRX) behaviour of as-cast austenitic stainless steel strip is investigated in order to study the extent of DRX that could heavily refine the as-cast austenite prior to phase transformation. The specimens were very quickly heated to the deformation temperatures to ensure that there was little or no change to the as-cast structure in order to simulate accurately the microstructure evolution and recrystallisation behaviour of the cast strip on reheating in the thermo-mechanical testing system. This investigation will assist the generation of the fundamental knowledge required to develop advanced high strength and formable steels using thin strip/slab casting processes. The results reveal that DRX of the coarse austenite grains is a relatively slow process and austenite will be refined completely by DRX under high deformation temperature (1100-1200°C) and slow strain rate (0.5-5s -1) conditions. It is observed that new grains nucleate predominantly at the parent austenite grain boundaries and tend to form in clusters.
AB - Dynamic recrystallisation (DRX) behaviour of as-cast austenitic stainless steel strip is investigated in order to study the extent of DRX that could heavily refine the as-cast austenite prior to phase transformation. The specimens were very quickly heated to the deformation temperatures to ensure that there was little or no change to the as-cast structure in order to simulate accurately the microstructure evolution and recrystallisation behaviour of the cast strip on reheating in the thermo-mechanical testing system. This investigation will assist the generation of the fundamental knowledge required to develop advanced high strength and formable steels using thin strip/slab casting processes. The results reveal that DRX of the coarse austenite grains is a relatively slow process and austenite will be refined completely by DRX under high deformation temperature (1100-1200°C) and slow strain rate (0.5-5s -1) conditions. It is observed that new grains nucleate predominantly at the parent austenite grain boundaries and tend to form in clusters.
KW - Austenitic stainless steel
KW - Coarse columnar grain
KW - Plane strain compression
KW - Recrystallisation
UR - http://www.scopus.com/inward/record.url?scp=84865443430&partnerID=8YFLogxK
U2 - 10.1016/j.msea.2012.07.050
DO - 10.1016/j.msea.2012.07.050
M3 - Article
SN - 0921-5093
VL - 556
SP - 685
EP - 695
JO - Materials Science and Engineering: A
JF - Materials Science and Engineering: A
ER -