TY - JOUR
T1 - Current opinion in medium manganese steel
AU - Lee, Y. K.
AU - Han, J.
PY - 2015/5/1
Y1 - 2015/5/1
N2 - Medium Mn steels have been actively investigated due to their excellent balance between material cost and mechanical properties. The steels possess a single a9 martensite phase in hot and cold rolled states and multiphases after intercritical annealing. Many studies have focused on investigating the influences of chemical composition and annealing conditions on the microstructure, particularly the grain size and retained γ (γR), and on the tensile properties. The steels exhibit high strength and good ductility due to transformation induced plasticity occurring in γR, whose volume fraction is approximately 0.2-0.4. The present review summarises the important results of previous studies about the effects of both intercritical annealing conditions and alloying elements on the microstructure and tensile properties of medium Mn steels.
AB - Medium Mn steels have been actively investigated due to their excellent balance between material cost and mechanical properties. The steels possess a single a9 martensite phase in hot and cold rolled states and multiphases after intercritical annealing. Many studies have focused on investigating the influences of chemical composition and annealing conditions on the microstructure, particularly the grain size and retained γ (γR), and on the tensile properties. The steels exhibit high strength and good ductility due to transformation induced plasticity occurring in γR, whose volume fraction is approximately 0.2-0.4. The present review summarises the important results of previous studies about the effects of both intercritical annealing conditions and alloying elements on the microstructure and tensile properties of medium Mn steels.
KW - Automotive steel
KW - Intercritical annealing
KW - Medium Mn steel
KW - Phase transformation
KW - Retained austenite
KW - Transformation induced plasticity
KW - Ultrafine grained steel
UR - http://www.scopus.com/inward/record.url?scp=84938837906&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84938837906&partnerID=8YFLogxK
U2 - 10.1179/1743284714Y.0000000722
DO - 10.1179/1743284714Y.0000000722
M3 - Review article
AN - SCOPUS:84938837906
SN - 0267-0836
VL - 31
SP - 843
EP - 856
JO - Materials Science and Technology (United Kingdom)
JF - Materials Science and Technology (United Kingdom)
IS - 7
ER -