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The structure and mechanical properties of amorphous and nanocrystalline Fe–Si–B alloys

This article describes the results of investigations of the microstructure of failure surfaces and the mechanism of deformation of an amorphous Fe80Si11B9 alloy, nanocrystallized with the use of Nd:YAG pulsed laser heating. The research included ‘in situ’ tensile testing in a scanning electron microscope. Mechanical properties were also measured on an Instron‐type machine for the amorphous and nanocrystalline alloys. The mechanical tensile tests performed on the amorphous and nanocrystalline samples showed a ductile fracture surface with very high fracture stress. Detailed observations of the flow deformation and fractures revealed the relationship between the quenched‐in crystalline and mechanical behaviour.