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Meeting 2016 TMS Annual Meeting & Exhibition
Symposium Material Behavior Characterization via Multi-Directional Deformation of Sheet Metal
Presentation Title On the Non-proportional Deformation of Sheet Steel Using In-situ Diffraction and Modelling Methods
Author(s) David M. Collins, Tomiwa O Erinosho, Fionn P E Dunne, Richard I Todd, Angus J Wilkinson
On-Site Speaker (Planned) Angus J Wilkinson
Abstract Scope Common alloys used in sheet form may display a significant ductility benefit when they are subjected to certain strain paths. This effect has been studied using a combination of in-situ high energy X-ray diffraction, electron backscatter diffraction and crystal plasticity finite element modelling (CPFE) on polycrystalline ferritic steel. A bespoke biaxial loading rig has been used to replicate proportional and non-proportional loading paths that sheet steel may be subjected to during component manufacture. During loading, the evolution of macro and microstrain, texture and geometrically necessary dislocation density have been measured. The results have demonstrated that the inhomogeneous strain accumulation from non-proportional deformation is strongly dependent on the texture generated and the applied strain-ratio of the first deformation pass. Experimental diffraction evidence is supported by results produced via a novel method of CPFE-derived diffraction simulations. Such CPFE simulations also indicate the degree of non-proportionality affects the dislocation distributions developed.
Proceedings Inclusion? Planned: A print-only volume


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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