| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Processing Effects on Microstructure and Material Performance
|
| Presentation Title |
A-135: On the Size Effects in Additively Manufactured Titanium and the Implications in AM Components |
| Author(s) |
Daniel Barba Cancho, Carles Alabort, Roger C. Reed, Enrique Alabort |
| On-Site Speaker (Planned) |
Daniel Barba Cancho |
| Abstract Scope |
The properties of additively- and conventionally-manufactured Ti-6Al-4V are different. The complex geometries in AM lead to significant property variations within a component - which depend upon the temperature gradients of the process. For the first time, in this work, the influence of the specimen size and orientation on the strength and ductility of additive manufactured Ti-6Al-4V is analysed and rationalised in a complete framework. First, the mechanical properties are addressed - as a function of surface-type, orientation, and size. Our results show systematic strengthening and severe drop in ductility as the material section is reduced. These are linked to microstructural and chemical variations. Strengthening is due to refinement of alpha-laths and prior-beta grains and oxygen enrichment. Ductility loss is due to poor surface quality and increased texture. Finally, these findings are used to develop conceptual design maps of strength-ductility as a function of the component type, thickness, and orientation. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |