Effect of residual stresses on the hardness of bulk metallic glasses

Probing elastically or plastically induced structural heterogeneities in bulk metallic glasses by nanoindentation pop-in tests

“…Since sample A was subjected to tensile pre-stresses at the Top area, τ max reduced dramatically to a mean value of 2.6 GPa, whereas the compressive pre-stresses at the Bottom area slightly increased τ max to a mean value of 3.2 GPa. Consistent with our previous works 25,29 compressive stress showed less significant effect on the pop-in load than tensile stress. A straightforward mechanics analysis shows that τ max of both compressive and tensile sides needs to be corrected by the pre-stress or residual stress.…”

Correlation between mechanical behavior and glass forming ability of Zr–Cu metallic glasses

“…As a result, mechanical properties such as fatigue behavior [23] and roomtemperature plasticity [24] vary. Recently, the research of Wang et al [25] indicated that tensile residual stress reduces the hardness significantly while compressive residual stress produces only a small effect on the hardness. As for glassy ribbons, the wheelside surface with a higher cooling rate should possess a compressive residual stress, according to the residual stress profile of a metallic glass plate [21].…”

Deformation feature and properties of Zr based bulk metallic glass treated by laser shock peening

“…However, subsequent studies showed that shot peening produced a soft layer (tens of micrometres), which may sacrifice the fatigue property of BMG. 6,7 Similar to but having more advantages over shot peening, laser shock peening (LSP) has been widely used to improve wear resistance and fatigue performance in metallic materials. [8][9][10] In the LSP process, a shock wave is generated and propagates into the target through the interaction of a pulsed high intensity laser beam and absorption layer on the metallic target surface.…”