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3030282 
Journal Article 
Current opinion in medium manganese steel 
Lee, YK; Han, J 
2015 
1 
Materials Science and Technology
ISSN: 0267-0836
EISSN: 1743-2847 
31 
7 
843-856 
WOS:000353472700012 
Medium Mn steels have been actively investigated due to their excellent balance between material cost and mechanical properties. The steels possess a single alpha 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 gamma (gamma(R)), and on the tensile properties. The steels exhibit high strength and good ductility due to transformation induced plasticity occurring in gamma(R), 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. 
Medium Mn steel; Transformation induced plasticity; Ultrafine grained steel; Phase transformation; Intercritical annealing; Automotive steel; Retained austenite