Plastic deformation behavior of amorphous Fe78Si9B13 alloy at elevated temperature

The plastic deformation behavior of amorphous Fe₇₈Si₉B₁₃ alloy was investigated under uniaxial tension and gas pressure bulging. The deformed specimens were studied by means of XRD and SEM. It is shown that amorphous Fe₇₈Si₉B₁₃ ribbon has good deformation ability in the temperature range from 450 °C to 500 °C. The elongation of 36.3% and the relative bulging height (RBH) of 0.45 were obtained at 500 °C. In the uniaxial tension test, the amount of the crystalline α-Fe phase increases with deformation temperature below the crystallization temperature, which also suggests that the tensile stress promotes the crystallization of amorphous Fe₇₈Si₉B₁₃ ribbon. The suitable gas pressure bulging conditions for the specimens are 500 °C, 3.4 MPa and 30 min.