| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials Design Approaches and Experiences V
|
| Presentation Title |
New Alloy Design Strategy via Non-conventional Phase Transformation Pathways |
| Author(s) |
Longsheng Feng, Tianlong Zhang, Dong Wang, Yipeng Gao, Yufeng Zheng, Michael J. Mills, Hamish F. Fraser, Yunzhi Wang |
| On-Site Speaker (Planned) |
Yunzhi Wang |
| Abstract Scope |
Microstructural engineering has been the cornerstone of alloy development. Recently the development of highly heterogeneous / gradient microstructures and the discovery of dynamic phase transformations at extended defects have attracted a lot of attentions. The former has been shown to have a synergistic combination of (rather than trade-off between) strength and ductility, e.g., ultrafine-grain strength with coarse-grain ductility, while the latter has been shown to have a significant improvement of the high-temperature work-hardening behavior and creep performance in Ni-base superalloys, and ultralow modulus and non-hysteretic linear superelasticity in metastable beta Ti-alloys. In this presentation, we demonstrate the possibilities to create such hierarchical and gradient precipitate microstructures and dynamic and localized phase transformations at stacking faults and twin boundaries through non-conventional transformation pathway engineering by using a combined CALPHAD, phase transition graph (PTG) and phase field approaches. The work is supported by NSF under DMREF programs. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |