About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
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Additive Manufacturing Fatigue and Fracture: Effects of Surface Roughness, Residual Stress, and Environment
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Presentation Title |
Efficient Computational Framework for Image-based Micromechanical Analysis of Additively Manufactured Ti-6Al-4V Alloys |
Author(s) |
Somnath Ghosh, Maxwell Pinz, Steven Storck |
On-Site Speaker (Planned) |
Somnath Ghosh |
Abstract Scope |
This paper develops an image-based statistically equivalent microstructural volume element (SEMVE) and associated crystal plasticity constitutive relations for efficient micromechanical simulation of additively manufactured Ti-6Al-4V alloys, characterized by complex Widmanstatten morphology with 12 HCP alpha lath variants. The models are built from microstructural characterization and mechanical testing data for this material. A major step towards significant efficiency is the creation of an effective crystal plasticity framework for polycrystalline ensembles of parent beta grains with a parametric representation of the size, shape, orientation, and crystallography statistics of encompassing alpha laths. A major contribution is the development of the self-consistent boundary conditions that is implemented through embedding the SEMVE in a homogenized exterior domain in a concurrent model. Finally, parametric studies void volume fraction, aspect ratios, and orientation are all important for determining the overall effect on the material response. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Titanium, Modeling and Simulation |