Journal article Open Access

High strain rate tensile behavior of a quenching and partitioning (Q&P) Fe-0.25C-1.5Si-3.0Mn steel

Xia Peikang; Vercruysse Florian; Petrov Roumen; Sabirov Ilchat; Castillo-Rodríguez Miguel; Verleysen Patricia

The mechanical behavior and microstructural evolution of a quenched and partitioned (Q&P) Fe-0.25C-1.5Si-3.0Mn (wt. %) steel were investigated in a wide range of strain rates (10-4–103 s-1). The static tensile tests (10-4 and 10-2 s-1) were conducted using a universal testing machine, while high strain rate tests (500–1000 s-1) were carried out on a split Hopkinson tensile bar system. High speed camera imaging combined with the digital image correlation (DIC) technique were employed to study homogeneity of plastic deformation. Electron backscatter diffraction (EBSD) and scanning electron microscopy were used to characterize the microstructure evolution in the deformed zone and the fracture surface, respectively. The results indicate that the yield strength

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