| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing of Titanium-based Materials: Processing, Microstructure and Material Properties
|
| Presentation Title |
Nanostructures in the Direct Energy Deposited Ti-5Al-5Mo-5V-3Cr Alloy |
| Author(s) |
Sydney Fields, Deepak Pillai, Yiliang Liao, Rajarshi Banerjee, Yufeng Zheng |
| On-Site Speaker (Planned) |
Yufeng Zheng |
| Abstract Scope |
Additive manufacturing such as direct energy deposition (DED) has emerged as effective methods for producing near-net-shape Ti-based components, that can significantly reduce the material waste and production time associated with conventional machining processes. In this work, we study the nanostructures in the DED manufactured Ti-5Al-5V-5Mo-3Cr (wt.%, Ti-5553) alloy and their influence on the microstructural evolution during the post-printing heat treatment. The nanostructures formed during complexed rapid cooling and periodic heating during the DED process were revealed using transition electron microscopy and 3D atom probe tomography. The influence of heating rates, aging temperature, and cooling rates on the alpha microstructure during post-printing heat treatment were systematically investigated using scanning electron microscopy and MIPAR image analysis software. Refined, more-refined, and super-refined alpha microstructure with different number densities and microhardness were successfully generated. We will introduce the critical roles of post heat treatment on fine-tuning the alpha microstructure in the DED manufactured Ti-5553. |