About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Advances in Titanium Technology
|
Presentation Title |
In-situ Observation of Twinning Pathways in TRIP/TWIP Ti-12Mo Alloy |
Author(s) |
Fan Sun, Bingnan Qian, Lola Lilensten, Philippe Vermaut, Frédéric Prima |
On-Site Speaker (Planned) |
Fan Sun |
Abstract Scope |
The metastable beta Ti-12Mo alloy exhibits both TRansformation Induced Plasticity (TRIP) and TWinning Induced Plasticity (TWIP) during tensile deformation. TRIP is due to martensitic transformation induced by plastic deformation. TWIP is resulted from mechanical twinning in not only beta phase (BCC phase) but also stress-induced martensite. The shear strains of these twinning operations contribute to the plasticity of the alloy.
The presentation will introduce the recent results about the complex twinning pathways observed in the alloy, focusing on the special twinning-detwinning process in martensite. The experiments are carried out using in-situ EBSD and TEM characterizations. The results show that two twinning modes {130}<-310> and {110}<-110> are operational in the martensite. The hierarchical twinning is observed in the martensite leading to complex twin structure. During tensile unloading, a multi-step detwinning process reverses the twinned martensite to its original orientation, resulting in rubber-like mechanical behavior. |
Proceedings Inclusion? |
Planned: |
Keywords |
Titanium, Mechanical Properties, Phase Transformations |