| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Mechanical Behavior at the Nanoscale VI
|
| Presentation Title |
NOW ON-DEMAND ONLY – Atomistic Simulation of Amorphous/Crystalline Metal Composite Interface Mechanical Behavior by Nanoindentation |
| Author(s) |
Amir Abdelmawla, Thanh Phan, Liming Xiong, Ashraf Bastawros |
| On-Site Speaker (Planned) |
Amir Abdelmawla |
| Abstract Scope |
Here we study the plastic flow in A/C-MCs under indentation loads using molecular dynamic (MD) simulations with the aim of quantifying how the nanoscale amorphous/crystalline interface (ACI) mediates the plastic flow in such materials. The microstructure near the ACI is analyzed for six different compositions of Cu/CuZr A/C-MCs. Furthermore, the atomic deformation processes in both crystalline (C-) and amorphous (A-) phases near the amorphous crystalline interface (ACI) are investigated and correlated with the material’s overall constitutive behavior. Our major findings are: (i) the ACIs enable a co-deformation of the A- and C-phases through “stiffening” the soft phases but “softening” the stiff phases in A/C-MCs through different micro-mechanisms; (ii) there exists an ACI-induced transition zone with a thickness of ~10 nm; and (iii) the GUM population gradient is modulated by the chemical composition of the A/C-MCs. These findings may support the design of A/CMCs with unprecedented properties from the bottom up. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Other, Other, Other |