Ductility of a Zr-based bulk-metallic glass with different specimen's geometries

The ductility of a Zr52.5Cu17.9Ni14.6Al10Ti5 bulk-metallic glass with different specimen's geometries in quasistatic compression experiments was investigated. The length (l) to diameter (d) ratio, l / d, of specimens significantly affects the demonstration of the ductility. The specimens with the l / d larger than 0.75 exhibit a poor ductility, while those with the l / d equal to and smaller than 0.75 show an excellent ductility. The maximum elongation before the failure was observed to be up to about 80%. This difference in ductility is a result of the geometrical constraints. The present study demonstrates that the bulk-metallic glass has the outstanding intrinsic ductility.