Deformation-enhanced hierarchical multiscale structure heterogeneity in a Pd-Si bulk metallic glass

Atomic-scale homogeneous plastic flow beyond near-theoretical yield stress in a metallic glass

“…Similarly, Guo et al 39 speculate that the spread-out nature of the flow in such small dimensions is due to the low probability of finding "pre-damaged fertile sites" that could lead to shear localization, under which circumstances a redistribution of free volume will occur in "dislocation-like" shear events happening all over the small volume that "seem homogeneous", whereas Luo et al 40 consider "modest-range strain relaxation via atom diffusion". Finally, Liu et al 55 have recently examined atomic-scale structural heterogeneity in a BMG near surfaces and its reorganization during bending using a synchrotron diffraction technique. Their study finds that the glass' heterogeneous short-range atomic arrangements change during deformation, an observation that may in some cases reflect the relative movement of atoms in a fashion that could be interpreted as "small STZ motion" or, in other instances, would allow the formation of small, but temporally transient STZs.…”

WITHDRAWN: Rejuvenation by enthalpy relaxation in metallic glasses

“…The second coordination peak of the pair distribution function (PDF) profile (Supplementary Fig. 7) is related to the connection of short-range clusters at the medium-range order (MRO) length scale 35 . It has been suggested that the connection modes of clusters at the MRO length scale in metallic glasses may affect the macroscopic plasticity 35,36 .…”

“…7) is related to the connection of short-range clusters at the medium-range order (MRO) length scale 35 . It has been suggested that the connection modes of clusters at the MRO length scale in metallic glasses may affect the macroscopic plasticity 35,36 . Generally, there are four kinds of cluster connection modes, i.e., vertex-shared (1-atom), edge-shared (2-atom), face-shared (3-atom), and intercross-shared modes (4-atom) 37 .…”

“…The average cluster radius R is estimated by the weighted bond length of coordination atoms. The center distance of the four cluster connection modes can be calculated as 2R (1-atom), √3R (2-atom), √8/3R (3-atom), √2R (4-atom), respectively 35 . Therefore, the second-nearest-neighbor coordination shell of g(r)…”

Densification and heterogeneity enhancement of a Fe-based metallic glass under local plastic flow

“…均匀性的变化 [32,33] 。如图 4(e)所示，通过在±5°的圆弧上对二维图谱进行方位 据报道，可以利用 G(r)曲线峰位置的移动来描述体积应变 ε(即 ε=(r/r0) 3 -1) [34,35] [23] 。因此，结合 G(r)曲线的 [36] 。此外，我们也进行了 FSB-0 和 FSB-35 样品的 环形暗场扫描 TEM(ADF-STEM)测量，如图 6(c)和(d)所示，在纳米尺度上检 测到由暗区和亮区交替形成的不均匀对比 [37] ； 可发现， 与 FSB-0 样品相比， FSB-35 图，可发现，在压头区域周围存在两种类型的局部塑性变形行为，即半圆形的剪 切带以及沿径向传播的裂纹 [38] 。与未变形的 FSB-0 样品相比，FSB-35 样品的局…”