| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Material Behavior Characterization via Multi-Directional Deformation of Sheet Metal
|
| Presentation Title |
An Investigation into Improved Elongation-to-fracture in AHSS via Continuous Bending Under Tension |
| Author(s) |
Rishabh Sharma, Camille Poulin, Marko Knezevic, Michael Miles, David Fullwood |
| On-Site Speaker (Planned) |
Rishabh Sharma |
| Abstract Scope |
Continuous bending under tension (CBT) can achieve strains well above the uniaxial tension forming limit curve. In this study, optimal CBT processing conditions lead to an increase in elongation-to-failure of 4.3 and 3 times the uniaxial tension value, respectively, for quenched and partitioned and TRIP aided bainitic ferrite 1180 steels. A macro- and micro- scale investigation revealed several insights into the forming process. Digital image correlation was used to map strains on the surface of the sample, and a combination of electron backscatter diffraction (EBSD) and high-resolution EBSD was used to map microstructure evolution (including retained austenite transformation rate) and development of geometrically necessary dislocations in interrupted CBT samples. The retained ductility of the interrupted CBT samples was measured in uniaxial tension. The study indicates slower strain hardening than uniaxial tension while delaying plastic instability. The transformation rate of the RA is slower and evenly distributed across the entire deformation. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |