| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing Fatigue and Fracture IV: Toward Confident Use in Critical Applications
|
| Presentation Title |
Microscale Analysis of the Synergistic Effects of Notch and Post-processed Microstructures in AM Ti-6Al-4V |
| Author(s) |
Lara Draelos, Peeyush Nandwana, Ankit Srivastava |
| On-Site Speaker (Planned) |
Lara Draelos |
| Abstract Scope |
Electron beam powder bed fusion of Ti-6Al-4V results in anisotropic mechanical behavior. The microstructure of AM Ti-6Al-4V can be modified by post-process heat treatments to engineer the extent of anisotropy. However, post-processing results in microstructures that promote strain-localization. Specifically, sub-transus heat treatment results in strain-localization normal to the build/loading direction whereas super-transus heat treatment results in random strain-localization patterns at length-scales greater than microstructural length-scale. Our objective is to unravel the effect of post-process microstructures on the deformation and fracture response of AM Ti-6Al-4V under complex deformation fields such as those that develop in the presence of a notch. To this end, smooth and notched specimens of as-processed and post-processed materials are deformed under tension inside a microscope. This allows us to capture both the macroscopic and the microscopic mechanical response. We will present the results correlating the effects of notch, microstructure, microscale deformation and macroscale response of the material. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |