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Meeting 2016 TMS Annual Meeting & Exhibition
Symposium Material Behavior Characterization via Multi-Directional Deformation of Sheet Metal
Presentation Title Multi-scale Analysis of Springback in Microforming of Thin Nickel Sheets
Author(s) Ziwei Zeng, Mitica Afteni, Kaifeng Wang, Mihaela Banu
On-Site Speaker (Planned) Mihaela Banu
Abstract Scope Microforming is a mass production process of small lightweight components for various applications (e.g. electronics, medical devices, micro manufacturing). Dimensional accuracy of these components is very important for their further assembly. Springback is one of the key factors in estimation the accuracy of the formed component. In this paper it is presented a multi-scale analysis of the springback behavior of pure nickel sheets of 0.5mm thickness by numerical modeling and experiment after micro deep drawing cups with 9.6 mm diameter. To determine the effect of the grain size and their position relative to the sheet surface, two heat treatments were applied to nickel sheets in order to obtain two thickness over grain diameter ratios. The modeling approach couples micro and macro-scale though implementation of a strain gradient crystalline plasticity model. Numerical results are compared with the experimental ones.
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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