Microindentation of a Zr<SUB>57</SUB>Ti<SUB>5</SUB>Cu<SUB>20</SUB>Ni<SUB>8</SUB>Al<SUB>10</SUB> Bulk Metallic Glass

Abstract

Using microindentation technique, the indentation behavior of a Zr 57 Ti 5 Cu 20 Ni 8 Al 10 bulk-metallic glass is studied over a range of the indentation load from 200 mN to 5000 mN. For the indentation load larger than 1000 mN, the indentation load-depth curves during unloading display three regions, a) a fast unloading phase at the onset of unloading, b) a linear phase at which the indentation load is proportional to the indentation depth, and c) a slow unloading phase after the linear phase. The size of the linear region increases with the increase in the indentation load, and the slope is independent of the indentation load. The indentation hardness decreases slightly with the increase in the indentation load. The plastic energy dissipated in an indentation cycle is proportional to the 3/2 power of the indentation load. The effect of the indentation loading rate on the indentation behavior is discussed.

Localized deformation of a Cu46.25Zr45.25Al7.5Er1bulk metallic glass

“…The parameter of µ is 0.57 for the indentations on the bulk BMG and 0.92 for the indentations on the interface, in which the unit of the indentation load is Newton. According to the result given by Chen et al [20], one expects that there is an indentation size effect in the indentation of the Cu-based BMG.…”

Indentation of titanium processed by equal channel angular pressing

“…an exponential index of 1.9 ± 0.2 between the indentation load and the residual indent, which is the same as that between the indentation load and the residual indentation depth. According to the result given by Chen et al [14], one expects that there is an indentation size effect in the indentation of the ECAPprocessed CP-Ti. It is worth mentioning that the cause of the indentation size effect is complex.…”

Anelastic indentation recovery of bioglass at room temperature

“…The recovery rate decreases with increasing the indentation load under the indentation conditions. Using dimensionless analysis, Chen et al [12] obtained the anelastic energy dissipated in an indentation loading-unloading cycle, E p , as…”