Mechanical properties of Fe-based amorphous-crystalline composite: a molecular dynamics simulation and experimental study

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.

Automated summary

The newly prepared Fe-based amorphous-crystalline composite Fe55Cr15Mo15Ni10W5 exhibits good ductility with a hardness about 75% higher than that of the master ingot. The mechanical properties obtained from nanoindentation and molecular dynamics simulation are in good agreement, confirming the composite's excellent performance at the nanoscale.