About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
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Symposium
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Heterostructured and Gradient Materials (HGM IV): Tailoring Heterogeneity for Superior Properties
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Presentation Title |
Lattice Defect Development in Harmonic Metals through Atomic Simulations |
Author(s) |
Tomotsugu Shimokawa, Tatsuya Hasegawa, Tomoaki Niiyama |
On-Site Speaker (Planned) |
Tomotsugu Shimokawa |
Abstract Scope |
Harmonic (core-shell) materials, with a network structure in which coarse-grain regions (core) are surrounded by fine-grain regions (shell), show both higher strength and higher elongation than homogeneous fine grain or coarse grain structured metals. In this study, elucidating the effect of structural heterogeneously on lattice defect developments and on mechanical properties of harmonic materials, we perform tensile loading tests to harmonic metals, of Al or Cu through molecular dynamics simulations. The grain sizes of shell and core regions are 9 nm and 27 nm, respectively. The propagation of plastic deformation via the interface between shell/core regions and the propagation direction is influenced by the existence of intragranular dislocations. This causes the inhomogeneous deformation between shell and core regions. We will show the influence of such inhomogeneous lattice defect development on the mechanical properties of harmonic metals. |
Proceedings Inclusion? |
Planned: |