About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
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Advanced Characterization Techniques for Quantifying and Modeling Deformation
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Presentation Title |
Kink Band Formation in Nano Metallic Laminates |
Author(s) |
Yifan Zhang, Rodney J. McCabe, Miroslav Zecevic, Thomas Nizolek , Nan Li, Ricardo A Lebensohn, John S. Carpenter , Laurent Capolungo |
On-Site Speaker (Planned) |
Yifan Zhang |
Abstract Scope |
Kink band (KB) formation is a common but not-well understood failure mechanism in anisotropic materials such as nano-metallic laminates (NMLs). In this work, we utilize in situ micro pillar compression in a SEM. S/TEM and transmission Kikuchi diffraction (TKD) microstructure analyses provide detailed microstructure characterization before and after kink band formation. We study the effects of layer thickness, layer waviness, interfaces, material system, and annealing on KB formation in Al/Fe, Ag/Fe and Cu/Fe NMLs prepared by accumulative roll bonding (ARB). The probability of observing kink banding decreases and the initiation strain for kink banding increases with increased layer thickness, decreased waviness amplitude, annealing, and decreased interface barrier strength to dislocation transmission. Furthermore, the experiments are simulated using a strain-gradient crystal plasticity model based on fast Fourier transforms, and good agreement is observed, which allow us to rationalize the microscopic mechanisms controlled by dislocation/interface interactions, leading to KB formation. |
Proceedings Inclusion? |
Planned: |
Keywords |
Mechanical Properties, Characterization, Modeling and Simulation |