About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Bulk Metallic Glasses XX
|
Presentation Title |
Mechanical Properties and Scaling Laws of Bicontinuous Nanoporous Metallic Glasses |
Author(s) |
Chang Liu, Suyue Yuan, Jinwoo Im, Felipe P. J. de Barros, Sami F. Masri , Paulo Branicio |
On-Site Speaker (Planned) |
Paulo Branicio |
Abstract Scope |
The mechanical properties of bicontinuous nanoporous CuxZr1-x metallic glasses (MGs) with five different compositions, x = 0.28, 0.36, 0.5, 0.64, and 0.72, and porosity in the range 0.1 < φ < 0.7 are evaluated performing tensile loading molecular dynamics simulations. Results indicate a strong dependence of the Young’s modulus (E) and ultimate tensile strength (UTS) on porosity and composition. By increasing the porosity from φ = 0.1 to φ = 0.7, the topology of the nanoporous samples shifts from closed cell to open-cell bicontinuous, inducing a brittle-to-ductile transition in the deformation and failure mechanisms, from a single critical shear band to necking and rupture of ligaments. Genetic programming (GP) is employed to uncover scaling laws for E and UTS as a function of porosity and composition, enabling accurate prediction of both the values of E and UTS in the whole range of porosity and compositions considered. |
Proceedings Inclusion? |
Planned: |
Keywords |
Computational Materials Science & Engineering, Mechanical Properties, Machine Learning |