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Meeting 2016 TMS Annual Meeting & Exhibition
Symposium Material Behavior Characterization via Multi-Directional Deformation of Sheet Metal
Presentation Title An Experimental and Microstructural Investigation of Biaxial Bauschinger Effects in Sheet Metals
Author(s) Markus Härtel, Martin F.-X. Wagner
On-Site Speaker (Planned) Markus Härtel
Abstract Scope Classically, the Bauschinger effect refers to a reduction of yield strength after a load path change under uniaxial loading. In this contribution, we present first results of an experimental investigation on Bauschinger effects in the sheet metals DC06 and AA1050 subjected to in-plane biaxial loading: We first performed biaxial tensile tests with cruciform specimens up to different pre-strains. Then, smaller specimens were prepared from the biaxially deformed inner part of the cruciform specimens. With these smaller specimens, we performed biaxial compression tests in a newly developed test-rig. Both materials exhibit distinct Bauschinger effects when subjected to biaxial load path changes. Their mechanical behavior differs from the uniaxial behavior when evaluated by conventional parameters such as Bauschinger Effect factor or Bauschinger strain. We discuss how these novel Bauschinger effects can be rationalized by considering the results of residual stress measurements and TEM investigations at the different stages of biaxial loading.
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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