3D DD Investigations of the Role of Interfaces on Dislocation Plasticity
(2017) MRS Spring Meeting 2017 — Location: Phoenix, USA (17.April.2017)
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- Abstract
- In this paper, we illustrate the role of interfaces in the dislocation organization and the consequence on the mechanical response through several investigations based on 3D discrete dislocation dynamics (DD) simulations. In a first example, we perform DD simulations on individual grains of same volume but different aspect ratios to understand the influence of the grain shape on the slip system activity and on the back stresses produced. Then, a polycrystalline version of the DD code coupled with a finite element method is used to perform simulations of a nanocrystalline free standing thin film of Palladium with varying both the texture and grain size distributions. In a last example, spherical nanoindentation of Cu is simulated and compared to simulations where a graphene layer has been deposited on the indented surface. For each cases, DD simulation results are compared to experiments in order to reveal the physics at the origin of the macroscopic response.
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Fivel, M., Tummala, H., Hammad, M., Pardoen, T., Idrissi, H., & Delannay, L. (2017). 3D DD Investigations of the Role of Interfaces on Dislocation Plasticity. MRS Spring Meeting 2017, Phoenix, USA. https://hdl.handle.net/2078.5/228161