About this Abstract |
| Meeting |
Materials Science & Technology 2020
|
| Symposium
|
Additive Manufacturing of Metals: Complex Microstructures and Architecture Design
|
| Presentation Title |
Evaluation of Microstructure in Multi Bead Ti-6Al-4V |
| Author(s) |
Amaranth Karra, Ali Guzel, Hangman Chen, Amit Kumar Verma, Anthony D. Rollett |
| On-Site Speaker (Planned) |
Amaranth Karra |
| Abstract Scope |
Ti-6Al-4V printed by laser-hot-wire robotic welding is used for calibrating a model predict the properties based on machine parameters and this contains the thermal, microstructural and strength mode. Different geometries such as multi-beads, T-sections and overhangs produces different thermal histories. The microstructure contains fine Widmanstätten colony and basketweave α with coarse columnar β grains. The thermal cycles produced by multiple passes result in approximately equidistant bands and a transient region in the top. This work primarily quantified the banding and α morphologies using optical and scanning electron microscopy. XRD was used for the variation of c/a ratio and lattice parameters. An automated technique was developed using python to calculate α lath thickness from SEM images. The results of, and methodology developed for data acquisition and analysis will be discussed. |