2010 Volume 51 Issue 11 Pages 2033-2038
We have examined difference in embrittlement behavior of characteristic Zr-based metallic glasses of Zr55Cu30Al10Ni5, Zr59Cu31Al10 and Zr65Cu17.5Ni10Al7.5. All of the metallic glasses are embrittled with the precipitation of crystalline phases, and the crystalline phases for the Zr55Cu30Al10Ni5 metallic glass change in annealing temperatures of Tg-15 K and Tx-50 K. The embrittlement behavior is relating well with the behavior of the precipitated crystalline phases and is caused with step-wise process when the several kinds of crystalline phases are precipitated continuously and complexly. The precipitation of crystalline seems to relate to formation of shear band with the embrittlement behavior. Especially, CuZr2 phase causes much shear band near fracture point with bending test.