Isothermal creep of metallic glasses: a new approach and its experimental verification

The characterization of creep and time-dependent properties of bulk metallic glasses using nanoindentation

“…Additionally, we notice that there are two inflexions in the creep compliance curves. This result was similar to that measured by rheometry [29]. The retardation spectra can be derived from [26] Fig.…”

Mechanical Relaxation of Metallic Glasses: An Overview of Experimental Data and Theoretical Models

“…The former was explained by the activation energy spectrum, while the latter was explained in terms of free volume theory [21]. However, it should be noted that this sharp separation between TSRO and CSRO is criticized because CSRO is unlikely without an accompanying TSRO [23,24]. Borrego et al [25] studied aging by monitoring enthalpy and Curie temperature changes in Fe(Co)-Si-Al-Ga-P-C-B and Finemet glasses.…”

Avalanche Size Scaling in Sheared Three-Dimensional Amorphous Solid

“…Detailed knowledge of plastic deformation mechanisms in amorphous solids, and their connection to macroscopic flow properties, however, remains elusive: While in crystals the dislocation provides a well-defined starting point for estimates of flow stress, f , in glasses there is no such easily characterizable defect. The traditional picture of deformation in amorphous solids-pioneered by Argon [5] and co-workers-is that plasticity involves collections of ''relaxation centers'' [6] or ''sheartransformation zones'' (STZs) [7] which operate as localized centers of deformation. This picture is supported by simulations of deformation in amorphous metals [7][8][9][10][11][12] and observations of localized events [9,13].…”

“…Mean-field theories of plasticity [6,7,14] rely on this viewpoint, with the additional assumption that STZs operate somewhat independently. But the detailed nature of correlations between shear transformations is a subtle issue.…”