Controllable brittleness in soft-magnetic Fe-P-C-B metallic glasses through composition design

The influence of the substitution of metalloid element P for Fe in Fe-P-C-B amorphous system on phase constituent, thermal properties, tensile mechanical properties and bending ductility were evaluated. The transition behavior from brittleness to ductility for the amorphous ribbons can be controlled through the alloy design. Moreover, the atomic and electronic structures of the typical Fe-P -C-B metallic glasses were simulated by the ab initio calculations. Combining with experimental and theoretical results, it provides a possible understanding of the brittle-ductile transition caused by the chemical element tailoring in Fe-P-C-B metallic glasses.