About this Abstract |
Meeting |
2025 TMS Annual Meeting & Exhibition
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Symposium
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Atomistic Simulations Linked to Experiments to Understand Mechanical Behavior: A MPMD Symposium in Honor of Professor Diana Farkas
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Presentation Title |
Atomistic simulation study on the deformation behaviors of nanotwined NiMo alloys |
Author(s) |
Jea-Young Hwang, Won-Seok Ko |
On-Site Speaker (Planned) |
Jea-Young Hwang |
Abstract Scope |
Nanotwinned materials have attracted much attention for overcoming the ordinary trade-off relationship between the strength and ductility of materials. This extraordinary property relation has been thought to be caused by the interaction between dislocations and twin boundaries. However, due to the complexity in the microstructure of practical materials, such as the grain size, inclination of twins inside a grain, and twin boundary spacing, it is very difficult to directly identify the specific deformation mechanism in usual experimental studies. As an example, we focused on Ni-Mo alloys for the high temperature applications, which are known to exhibit high twin boundary density in sputter-deposited films. We examined detailed deformation mechanisms of nanotwinned Ni-Mo alloys by performing a series of molecular dynamics simulations using a newly developed second nearest-neighbor modified embedded-atom method (2NN MEAM) interatomic potential. The results presented in this study provide further insight into the enhanced properties of nanotwinned materials. |
Proceedings Inclusion? |
Planned: |
Keywords |
Computational Materials Science & Engineering, Copper / Nickel / Cobalt, Mechanical Properties |