Abstract
Abstract The glass transition and viscous flow behavior of Fe 83− x M x P 17 (M = Cr, V or Mo) amorphous alloys was examined using DSC and TMA to clarify the effect of M-substitution on the ideal glass transition temperature ( T gi ), onset temperature of crystallization, viscosity and displacement during a TMA test under an applied stress of 2.5–20 MPa. All the samples exhibit minimum viscosity at the steady state viscous flow temperature. The higher the stress level, the lower the T gi . The decrease in T gi seems to be attributed to a decrease in the free volume and defects in the amorphous alloys. We observed mid-contraction phenomena due to the structural relaxation effected by an external applied stress. The stress level at which the viscous flow occurs increases in the order: chromium, vanadium, molybdenum.
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