Abstract
This work reports the preparation and mechanical properties of FeSiB(MoCu) nanocrystalline alloys wire. The amorphous alloys wire samples were directly cast by the rotating water-bath meltspinning process. Isothermal annealing experiments were undertaken based on parameters established from dynamic crystallisation studies by differential scanning calorimetry. The three alloys annealed to a nanoscale grain structure consisting predominantly of αFe(Si) having a mean crystallite size of 15-45 nm. The ternary alloy (FeSiB) and the quarternary alloy (FeSiBMo) showed evidence of secondary crystalline phases. A fracture strength of 2000 MPa was observed for the single crystalline phased FeSiBMoCu alloy and a value of ∼1000 MPa for the other alloys. The measured strengths of the wire samples do not appear to be dependent on the grain size but, rather, are sensitive to the presence of brittle secondary phases.