Models Of Tensile Behavior OF Meta-Stable Fe-Mn-Mo Alloys
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A semi-mechanistic model for predicting the flow behaviour of
Fe-Mn-Mo steels displaying transformation-induced plasticity
is developed in this paper. The model, based on the law of
mixtures, takes into account the work-hardening of the
individual principal phases (namely, lath-martensite and
austenite/epsilon martensit~). The composite strength of
such a steel may be given by a modified law of mixtures
which incorporates a dislocation density effect. To test the
validity of the model, experiments have been performed using
a magnetic reluctance technique to determine the extent
of 'f + F.: 7 a.' transformaU.on induced by tensile plastic
deformation at room temperature. As the 'f + e: 7 a.'
transformation progressed the work-hardening of the steels
was found to increase rapidly. It is concluded that the
ind~ced lath-martensite in a work-hardened austenite/epsilon
mat~ix is most effective in enhancing strength and ductility
Keywords
T Technology (General), TJ Mechanical engineering and machinery