| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing Materials in Energy Environments
|
| Presentation Title |
Multi-scale Deformation Behavior of Direct Energy Deposited Stainless Steels, from Cryogenic to Room Temperature |
| Author(s) |
Yen Ting Chang, Marie Agathe Charpagne |
| On-Site Speaker (Planned) |
Yen Ting Chang |
| Abstract Scope |
Direct energy deposition (DED) holds significant promises for scalable additive manufacturing (AM) as well as repair in critical energy infrastructures. Stainless steels, in particular, are materials of choice for cryogenic applications and storage of liquefied gases (e.g. hydrogen, natural gas). Highly sensitive to the stacking fault energy and local microstructure, the cryogenic mechanical properties in AM stainless steels are currently unexplored.
Here, we investigate the deformation mechanisms in DED 304L and 316L stainless steels from a multi-scale perspective, at 273K and 77K. Digital image correlation and complimentary electron back-scattered measurements carried out over tracked microstructure regions reveal intrinsic linkages between the unique features of AM steels and activation of twinning induced plasticity (TWIP) and transformation induced plasticity (TRIP). Comparison with the wrought versions of these materials provides insights into microstructure engineering pathways for superior strength, ductility, and resistance to fracture using DED AM. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Mechanical Properties, Energy Conversion and Storage |