No abstract

No abstract

No abstract

Novel crystallization behaviors of Zr 55 Cu 30 Al 10 Ni 5 bulk metallic glass are investigated. On the one hand, mixed oxides, including CuO, CuAlO 2 , CuAl 2 O 4 and ZrO 2 , show sequential oxidation process determined by coupling effects of specific cyclic load and temperature. On the other hand, at a temperature (100 °C) by far lower than T g of 412 °C, under cyclic loading condition, non-oxidized binary alloy CuZr 2 is precipitated; the thermo-mechanical coupled effects of temperature below T g and fatigue accumulation on the non-oxidized crystallization behaviors are revealed. Meanwhile, at a constant temperature of 400 °C, by comparing among the XRD patterns, respectively, obtained from tensile, creep and fatigue fractures, the dominating effect of cyclic load on the generation of non-oxidized CuZr 2 is verified. Furthermore, the crystallization behavior of amorphous phases under cyclic loading condition is observed through TEM micrograph and diffraction pattern at 100 °C.

No abstract