Hot Rolling Effect upon the High Temperature Johnson-Cook Strength and Failure Models for a 15V38 Grade Steel

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Proceedings of the Materials Science & Technology Conference & Exhibition, MS&T17 (2017, Pittsburgh, PA), Page: 1045-1053

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Buchely, Mario; Van Aken, David C.; O'Malley, Ronald J.; Chandrashekhara, K.; Lekakh, Semen Naumovich
Mechanical Engineering; Metallurgy; Structural Materials
conference paper description
A commercially produced 15V38 grade steel (0.38C, 1.3Mn, 0.57Si, 0.13Cr, 0.08V) was studied in the cast and hot-rolled condition. Mechanical testing was performed using a hydraulic load frame specifically adapted to perform tensile tests at different temperatures (up to 1300C) and different strain-rates (up to 20s-1). Plastic flow behavior and the strain at failure of the steel were modeled using the Johnson-Cook Strength model and the Johnson-Cook Failure model. The material’s model was implemented in ANSYS-AUTODYN to replicate the tensile experiments. The accuracy of each material curve was determined by comparing the experimental data with the FEA results. It was found that FEM simulation predicts the deformation of the material during the tensile test at medium strain-rates and temperatures; therefore, these models can be implemented to simulate deformation processes, such as hot metal rolling. Hot-rolled material shows higher properties and more consistent failure data comparing to the as-cast material.