Tristal steel is low-carbon construction-type steel widely used in the automotive industry, e.g., for braking components. Given the contemporary demands on the high-volume production of such components, these are typically fabricated using automatic sequential machines, which can produce components at strain rates up to 103 s-1. For this reason, characterising the behaviour of the used material at high strain rates is of the utmost importance for successful industrial production. This study focuses on the characterisation of the behaviour of low-carbon steel via developing its material model using the Johnson-Cook constitutive equation. At first, the Taylor anvil test is performed. Subsequently, the acquired data together with the results of observations of structures and properties of the tested specimens are used to fill the necessary parameters into the equation. Finally, the developed equation is used to numerically simulate the Taylor anvil test and the predicted data is correlated with the experimentally acquired one. The results showed a satisfactory correlation of the experimental and predicted data; the deformed specimen region featured increased occurrence of dislocations, as well as higher hardness (its original value of 88 HV increased to more than 200 HV after testing), which corresponded to the predicted distributions of effective imposed strain and compressive stress.

Department of Metal Forming and Plastic Faculty of Mechanical Engineering Brno University of Technology Technická 2 616 69 Brno Czech Republic

Faculty of Civil Engineering Institute of Technology of Building Materials and Components Brno University of Technology Veveří 331 95 602 00 Brno Czech Republic

Faculty of Materials Science and Technology VŠB Technical University of Ostrava 708 00 Ostrava Czech Republic

Institute of Physics of Materials Czech Academy of Sciences Žižkova 22 616 00 Brno Czech Republic

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