Deformation at variable strain rate of ARMCO iron
DOI:
https://doi.org/10.3989/revmetalm.2004.v40.i2.255Keywords:
Hot deformation, armco iron, constitutive equations, variable strainAbstract
The hot deformation of metallic materials is the overall balance between two antagonistic mechanisms. On one hand the material undergoes work hardening, and on the other hand, due to the thermal activation, it undergoes softening by dynamic recovery and recrystallization. Both phenomena are usually studied by mechanical tests carried out at constant true strain rate. However, most of the real processes are carried out under variable strain rate or interrupted deformation. The present work is focused on introducing a descriptive model of the hot working behaviour of an ARMCO iron under variable strain rates conditions. The model is based on a theory where the strain rate is constant.
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