| About this Abstract |
| 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 |