Serrated plastic flow during nanoindentation of a bulk metallic glass

Anelastic deformation of a Pd40Cu30Ni10P20 bulk metallic glass during nanoindentation

“…11 Recently, several authors have studied the mechanisms of plastic deformation in BMGs by means of nanoindentation. [12][13][14][15][16][17] In nanoindentation of BMGs, plastic deformation is manifested as pop-in events on the load-displacement curves during loading. 12 These serrations, which are more pronounced for low loading rates, have been related to the formation and propagation of shear bands.…”

“…[12][13][14][15][16][17] In nanoindentation of BMGs, plastic deformation is manifested as pop-in events on the load-displacement curves during loading. 12 These serrations, which are more pronounced for low loading rates, have been related to the formation and propagation of shear bands. [14][15][16][17] Although plastic deformation during nanoindentation has been studied to some extent in BMGs, time-dependent deformation effects have generally been overlooked.…”

Rate-dependent serrated flow and plastic deformation in Ti45Zr16Be20Cu10Ni9bulk amorphous alloy during nanoindentation

“…yielding), as in crystalline materials [11]. Golovin et al [12] and Greer and Walker [13] have reported quite an interesting feature of inhomogeneous deformation as continuous serrations (serial pop-ins) in a load displacement (p-h) curve during BMG nanoindentation. Following these investigations, similar discrete flow during nanoindentation has been observed in Pd-, Zr-, La-, Mg-, Cu-, Ce-, and Au-based BMGs [14,15].…”

Temperature, Strain and Strain Rate Dependence of Serrated Flow in Bulk Metallic Glasses

“…serrated flow. 20) More recent studies on the mechanical flow behavior of metallic glasses have mainly been performed by nanoindentation, [27][28][29][30][31][32][33] where instabilities and early failure are not as critical as in compression or bending. In agreement with studies on other deformation modes, 22,34,35) these investigations reveal a decrease in the serration amplitude ('pop-ins') with increasing indentation rate.…”