About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Nanostructured Materials in Extreme Environments
|
Presentation Title |
Exploring the Shear Localization in Metallic Nanolayered Composites via Atomistic Simulations |
Author(s) |
Caizhi Zhou, Shujing Dong |
On-Site Speaker (Planned) |
Caizhi Zhou |
Abstract Scope |
Metallic nanolayered composite (MNC) is a special type of composite material containing alternate layers of metals with layer thicknesses at nanometer scales. Due to their unique structure, great wear resistance, and improved radiation damage tolerance, they have attracted a lot of attention in recent years. However, their potential applications are limited by the formation of shear bands (SB) in compression or early fractures in tension. The present work explores the effects of layer thickness and crystal structure on the shear band formation in FCC/FCC and FCC/BCC MNCs with flat interfaces via molecular dynamics simulations. We analyze the configurations of dislocation structures, atomic separation distances of nearest neighbors, and von Mises shear strain distributions in the deformed samples with various layers thicknesses. Our results reveal that shear bands in MNCs form not only based on layer thicknesses and crystal structures, but also on the stacking fault energies of each phase. |
Proceedings Inclusion? |
Planned: |
Keywords |
Modeling and Simulation, Composites, Mechanical Properties |