About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Materials Design and Alloy Development VII – Design With Multi-Modal and Field Data by Integrating Uncertainty
|
| Presentation Title |
Ti-6Al-4V/316L Amalgamation: Leveraging Non-Equilibrium Solidification in Additive Manufacturing for Microstructural Control |
| Author(s) |
Adrita Dass, Muhammad Akmal, Reza Motallebi, Juan Antonio Vega Farje, Jenniffer Bustillos, Kaushalendra Singh, Chenxi Tian, Andrew C. Chuang, Kelvin Y. X. Xie, Atieh Moridi |
| On-Site Speaker (Planned) |
Muhammad Akmal |
| Abstract Scope |
Additive manufacturing enables unique non-equilibrium solidification pathways that can be leveraged for in-situ alloying or “amalgamation” using commercially available powders. In this study, Ti-6Al-4V (Ti64) was processed with up to 4.5 wt.% 316L stainless steel using powder bed fusion (PBF) to explore novel phase transformations not attainable through conventional routes. The phase evolution during solidification and rapid cooling was investigated using in-situ synchrotron X-ray diffraction and advanced electron microscopy. Beyond the typical α (or α′)/β matrix microstructure, the dissimilar melting behavior of Ti64 and 316L resulted in compositional segregation at melt pool boundaries, enriching regions with β-stabilizing elements and promoting the formation of stable or metastable β-Ti and α′′ phases. Additionally, localized Fe enrichment induced the formation of ordered intermetallic compounds, suggesting new opportunities for microstructural tuning through controlled mixing. This work demonstrates an innovative strategy for designing functional alloys through the amalgamation of commercially available powders in additive manufacturing. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Titanium, Solidification, Additive Manufacturing |