STRUCTURAL RELAXATION AND CRYSTALLIZATION OF AMORPHOUS TI60CU30NI10 ALLOY

Structural relaxation and crystallization have been followed in a Ti60 Cu30Ni10 metallic glass by a combination of experimental techniques. A t a frequency of 0.1 Hz, the internal friction shows two distinct peak s at 662.5 +/- 1.6 and 722.2 +/- 1.7 K, and the positions of the peaks correspond approximately to the peak temperatures observed in a diffe rential scanning calorimetry measurement. The origin of the internal f riction peak for Ti60Cu30Ni10 metallic glass is related to the amorpho us-crystalline transition. The onset temperature for viscous flow occu rs at a temperature close to that at which the internal friction start s to increase. It is thought that structural relaxation in the low-tem perature range is strongly related to the viscous-flow-induced interna l friction for this alloy system.