Abstract
Abstract Steels with high boron content are important materials to produce spent nuclear fuel storage. The large volume fraction of brittle borides in the high boron steel microstructure makes it very hard and not easily deformable. Preliminary investigation and simulation of the hot deformation behavior is a necessary step for the development of industrial forming technologies. Hot compression tests of high boron steels with 2.05 and 3.15 wt% of boron, respectively were performed in the temperature range of 800–1150 °C on a Gleeble 3800 testing system. Based on the experimental true stress – true strain data, the strain-compensated Arrhenius-type constitutive models were applied for both steels. The model for the steel with 2.05 wt% of boron was approved by additional compression tests and by finite element simulation. The effective activation energy of the high boron steel deformation decreased with an increasing of the volume fraction of the borides due to the particle stimulated nucleation on the borides-ferrite interface.
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