About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
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Bulk Metallic Glasses XVII
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Presentation Title |
X-ray Diffraction Study of the Local Topological Rearrangement and Plasticity of Bulk Metallic Glasses |
Author(s) |
Hui Wang, Wojciech Dmowski, Zengquan Wang, Yoshihiko Yokoyama, Hongbin Bei, Takeshi Egami |
On-Site Speaker (Planned) |
Hui Wang |
Abstract Scope |
The study of the room temperature (RT) plasticity of bulk metallic glasses (BMGs) is essential since the RT plasticity is Achilles' Heels of BMGs that limits their applications. Due to the intrinsic disordered structure, contrary to the well-defined defects in crystalline materials such as dislocations, the defects in metallic glasses (MGs) are just qualitatively described. It’s well established that “elastic” deformation of BMG is locally heterogenous and non-affine because of the local topological rearrangement (LTR) which is related to the emerging shear transformation zones (STZs) that control the nature of the plastic deformation during yielding. In this paper, the LTR is quantified by the local plasticity parameter, ε_0/ε_∞ , proposed through the in-situ high-energy X-ray diffraction of BMGs under compression and the anisotropic pair distribution function (PDF) analysis. The correlation between the microscopic structural correspondence of the elastic deformation and the macroscopic plastic behavior of BMGs is established. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |