| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
2023 Technical Division Student Poster Contest
|
| Presentation Title |
SPG-41: Strain Evolution and Damage Development during Tight-radius Bending of Advanced High Strength Steels |
| Author(s) |
Nizia Mendes Fonseca, David Wilkinson |
| On-Site Speaker (Planned) |
Nizia Mendes Fonseca |
| Abstract Scope |
Advanced High Strength Steels (AHSS) are recognized for their excellent trade-off between uniform tensile elongation and strength. However, tensile ductility fails to predict damage initiation during local forming operations required to fabricate complex automotive parts, which involve tight-radius bending and edge stretching. Therefore, it is crucial to understand how the microstructure of AHSS affects their behavior in tension and tight-radius bending. This work experimentally investigates a dual-phase (DP) and a quench and partitioning (QP) steel under bend loading at the macro and microscales. The methodology includes digital image correlation, in situ SEM testing, and X-ray computed microtomography. Results show that the main micromechanisms leading to damage are interface decohesion, resulting from a strain gradient at the phases interface, and cracking of martensite. Damage and fracture are delayed in the QP steel due to the better mechanical compatibility of its constituents and the effect of transformation-induced plasticity. |
| Proceedings Inclusion? |
Undecided |
| Keywords |
Shaping and Forming, Iron and Steel, Mechanical Properties |