About this Abstract |
Meeting |
5th International Congress on 3D Materials Science (3DMS 2021)
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Symposium
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5th International Congress on 3D Materials Science (3DMS 2021)
|
Presentation Title |
Three-dimensional Characterization and Modelling of Cyclic Deformation in Magnesium Alloys by High-energy X-ray Diffraction Microscopy |
Author(s) |
Duncan A. Greeley, Mohammadreza Yaghoobi, Darren Pagan, Veera Sundararaghavan, John Allison |
On-Site Speaker (Planned) |
Duncan A. Greeley |
Abstract Scope |
Fatigue behavior is a primary concern for lightweight structural components. To accurately predict the effect of microstructure and composition on low-cycle fatigue in rare-earth magnesium alloys, it is necessary to understand the effect of texture and grain size on micromechanical evolution during fatigue cycling. High-energy X-ray diffraction microscopy (HEDM) was utilized to analyze the three-dimensional character of deformation during a fully reversed tension-compression cycle in coarse and fine-grain size Mg-2.4wt.%Nd. Grain average strains in each microstructure were tracked in-situ with far-field HEDM. Slip activity and localization of strain were modelled with the PRISMS-Plasticity crystal plasticity finite element software using unloaded 3D grain morphologies and grain orientations characterized using near-field HEDM. The results of these crystal plasticity predictions are compared to far-field measurements. The dataset from this study is published publicly in the Center for Predictive Integrated Materials Science (PRISMS) Materials Commons data repository. |
Proceedings Inclusion? |
Definite: Other |