Dependence of Ductility on Free Volume in a Cu-Zr-Based Metallic Glass (pages 177–181)
Feng Jiang, Yanglei Zhao, Lincai Zhang, Shibin Pan, Yinggang Zhou, Lin He and Jun Sun
Version of Record online: 23 MAR 2009 | DOI: 10.1002/adem.200800262
Cu46Zr47Al7 bulk metallic glass alloy samples with different free volume states were obtained through thermal treatments such as annealing and quenching. Three-point bending tests were performed to these samples to evaluate their ductility. The results demonstrate that the ductility of BMGs is closely related to the free volume. The reduction in the free volume is the dominant reason for the embrittlement of samples annealed below Tg. In addition, the ductility of embrittled samples can be enhanced by restoring free volume by a short anneals above Tg followed by quenching.