Mechanical properties of Fe-based amorphous–crystalline composite: a molecular dynamics simulation and experimental study
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A new Fe-based amorphous–crystalline composite without non-metallic elements, Fe55Cr15Mo15Ni10W5, was prepared by melt-spinning. The formation ability and structure information were investigated by X-ray diffractometer (XRD), energy-dispersive spectrometer (EDS) and scanning electron microscope (SEM). The mechanical properties of the amorphous–crystalline composite were investigated by nanoindentation. A molecular dynamics simulation study was performed to simulate the formation of Fe55Cr15Mo15Ni10W5 amorphous alloy. The mechanical properties were obtained by compression simulations simultaneously. The results indicate that the Fe55Cr15Mo15Ni10W5 ribbon is an amorphous–crystalline composite structure with good ductility, and the hardness of the amorphous–crystalline composite is about 75% higher than that of master ingot. The simulation mechanical properties are in good agreement with the results of nanoindentation at the nanoscale.
KeywordsFe-based amorphous–crystalline composite Nanoindentation Molecular dynamics simulation Mechanical property
This research was financially supported by the National Key Research and Development Program of China (No. 2016YFC0801905).