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Meeting 2016 TMS Annual Meeting & Exhibition
Symposium Material Behavior Characterization via Multi-Directional Deformation of Sheet Metal
Presentation Title An Experimentally Validated, Microstructure Based Model for Forming of Low-symmetry Alpha-uranium
Author(s) , Miroslav Zecevic, Daniel R Coughlin, Andrew W Richards, Kester D Clarke, Irene J Beyerlein, Marko Knezevic
On-Site Speaker (Planned)
Abstract Scope Orthorhombic alpha-uranium exhibits extreme deformation anisotropy, and reliably forming parts with simple symmetries requires sophisticated rolling schedules to produce plates with low in-plane texture anisotropy. We have developed a microstructure based constitutive model for uranium deformation based on polycrystal plasticity theory and a viscoplastic self-consistent (VPSC) homogenization scheme. Calibration of the constitutive model is based on compression and tensile tests for multiple orientations, strain rates, and temperatures from three wrought uranium products having three different crystallographic textures. The constitutive model captures the range of experimental stress-strain responses and predicts the microstructure evolution (texture evolution and twin fraction) measured by electron backscatter diffraction (EBSD). We incorporate the constitutive model into Abaqus finite element simulations. Using this tool, we simulate rolling operations to predict microstructure and property evolution and forming operations to examine the effects of in-plate texture anisotropy. Both of these are validated directly with rolling and forming experiments.
Proceedings Inclusion? Planned: A print-only volume

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A Novel In-situ Planar Biaxial Experiment
Advanced Cruciform Testing at the NIST Center for Automotive Lightweighting
An Experimental and Microstructural Investigation of Biaxial Bauschinger Effects in Sheet Metals
An Experimentally Validated, Microstructure Based Model for Forming of Low-symmetry Alpha-uranium
Biaxial Loading of Anisotropic Al-6022-T4 Sheets Using Cruciform Specimens
Determination of Bending Limit Curves for Aluminium Alloy AA6014-T4: An Experimental Approach
Dilational Response of Voided Polycrystals
Effect of Complex Strain Paths on Microstructure Evolution Studied by In-situ Neutron Diffraction
Evalution of Formability in Aluminum Alloys across Strain Rates Using Digital Image Correlation Technique
Hardening Behavior of 316L SS Subject to Biaxial Strain Path Change: Multiscale Modeling for Guiding Experiments
Inflation of Stainless Steel 304L Microtubes under Axial Tension and Internal Pressure to Assess the Plastic Anisotropy
Modeling Anisotropic Hardening and Nonlinear Elasticity under Loading Path Change
Multi-scale Analysis of Springback in Microforming of Thin Nickel Sheets
On the Non-proportional Deformation of Sheet Steel Using In-situ Diffraction and Modelling Methods
Onset of Plasticity via Relaxation Analysis (OPRA)
Optimization of Biaxial Tensile Test Specimen Design
Predicting Cyclic Deformation of AA6022-T4 and DP590 Using Polycrystal Plasticity
Sensitivity Analysis of the Bauschinger Behavior on Bending Springback for Prestrained Sheets
The Influence of Deformation Mechanisms on Forming of Commercially Pure Titanium Sheets

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