Medium-Alloy Manganese-Rich Transformation-Induced Plasticity Steels

D. W. Suh, J. H. Ryu, M. S. Joo, H. S. Yang, K. Y. Lee and H. K. D. H. Bhadeshia


The manganese concentration of steels which rely on transformation--induced plasticity is generally less than 2 wt%. Recent work has highlighted the potential for strong and ductile alloys containing some 6 wt% of manganese, but with aluminium additions in order to permit heat treatments which are amenable to rapid production. However, large concentrations of aluminium also cause difficulties during continuous casting. Alloy design calculations have been carried out in an effort to balance these conflicting requirements, whilst maintaining the amount of retained austenite and transformation kinetics. The results indicate that it is possible by adjusting the carbon and manganese concentrations to reduce the aluminium concentration, without compromising the mechanical properties or transformation kinetics. The deformation-induced transformation of retained austenite is explained quantitatively, for a range of alloys, in terms of a driving force which takes into account the very fine state of the retained austenite.

Metallurgical and Materials Transactions 46A (2013) 286-293.

Download paper

Download figures and data

Related papers

duplex hardening of bearing steels

Envelope Coefficients Filling welds Hot Oxidation
Satoh FSW maps Powder metallurgy Solidification X80 pipes
Mixed Creep Extraordinary ductility Problems Mechanical stabilisation

PT Group Home Materials Algorithms