Strain-rate behavior in tension of the tempered martensitic reduced activation steel Eurofer97

Cadoni, Ezio and Dotta, Matteo and Forni, Daniele and Spaetig, Philippe (2011) Strain-rate behavior in tension of the tempered martensitic reduced activation steel Eurofer97. Journal of Nuclear Materials, 414 (3). 360 - 366.

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Abstract

The tensile properties of the high-chromium tempered martensitic reduced activation steel Eurofer97 were determined from tests carried out over a wide range of strain-rates on cylindrical specimens. The quasi-static tests were performed with a universal electro-mechanical machine, whereas a hydro-pneumatic machine and a JRC-split Hopkinson tensile bar apparatus were used for medium and high strain-rates respectively. This tempered martensitic stainless steel showed significant strain-rate sensitivity. The constitutive behavior was investigated within a framework of dislocations dynamics model using Kock's approach. The parameters of the model were determined and then used to predict the deformation range of the tensile deformation stability. A very good agreement between the experimental results and predictions of the model was found.

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