| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Heterostructured and Gradient Materials (HGM VI): Principle, Processing and Properties
|
| Presentation Title |
Effects of Aging on the Deformation Behavior and Mechanical Properties of Heavily Cold-Rolled Duplex Stainless Steel |
| Author(s) |
Chihiro Watanabe, Norimitsu Koga, Tomotsugu Shimokawa, Masakazu Kobayashi, Hiromi Miura |
| On-Site Speaker (Planned) |
Chihiro Watanabe |
| Abstract Scope |
The deformation behavior of heavily cold-rolled ferrite-austenite duplex stainless steel with and without aging was studied. After cold rolling, the austenite (γ) phase exhibited a heterogeneous-nano (HN) structure, whereas the ferrite (α) phase had conventional lamellae. Aging at 723 K increased both the yield stress and ultimate tensile strength (UTS), whereas aging at 773 K increased only the UTS. In-situ X-ray measurements revealed stress partitioning from the α phase to the γ phase after yielding. The age hardening of the α phase at 723 K was important for increasing yield stress and UTS. In addition, aging at 773 K improved the ductility of the α phase and phase stress in the γ phase, resulting in a lower yield stress but higher UTS. Therefore, the age hardening of the α phase plays an important role in the overall strengthening of HN-structured duplex stainless steel. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Iron and Steel, Mechanical Properties, Characterization |